Archive for July 2012

Ho hum, another GORGEOUS pic of the Sun

Just a reminder: the Sun is awesome:

[You MUST click that to get the fully enGdwarfenated 2200 x 2200 pixel picture. It's stunning.]

I’ve talked about Alan Friedman’s amazing Sun portraits so many times I need not elaborate here; just read the Related Posts below. But man! What a star.

Image credit: Alan Friedman.


Related Posts:

- The boiling, erupting Sun (Read this one first! Much is explained here.)
- Close-up of a solar monster
- No words
- Solar Cinco de Mayo
- The Sun’s angry red spot






Share






July 31st, 2012 1:20 PM Tags: ,

by in Astronomy, Pretty pictures | 3 comments | RSS feed | Trackback

Article source: http://blogs.discovermagazine.com/badastronomy/2012/07/31/ho-hum-another-gorgeous-pic-of-the-sun/

Tags: , <BR/>

Look to the stars at Ocean Pines library

OCEAN PINES — Kids of all ages will see stars Friday as Cosmic Adventures brings its traveling astronomy series to the Worcester County Library.

Two programs featuring portable planetariums will be held at the Ocean Pines branch at 10:30 a.m. and 11:30 a.m.

“Portable planetariums have been around since at least the late 1970s, but computerized versions like I have are more recent; the first came out in 2004,” said Greg Anderson, astronomy educator with Cosmic Adventures Traveling Planetarium. “I was working for a science outreach program at Gettysburg College in Gettysburg, Pa., at that time. We offered many science labs to schools, but little in the way of astronomy. About a year later — in the spring of 2005 — I had the opportunity to start my own business. I liked working with schools as I had been doing, and a traveling planetarium seemed like it might be unique enough to attract some interest.”

Anderson considers himself a lifelong science nut and has a degree in biology, though he admitted his fascination with astronomy is a relatively new one.

“I was always intrigued by the subject whenever I learned more about it in a professional capacity, and I took some formal coursework once I decided to make a go of the business,” he said.

“I believe that people of all ages can benefit from knowing more about the universe we are part of. As we put up more lights outside that dim our view of the sky and spend more time inside, we are losing our connection to the rest of the universe. The Cosmic Adventures planetarium gives people a chance to see what they are missing, and — hopefully — spark an interest in the real sky.”

The program begins with a look at the current night sky, including which stars and planets are visible to the naked eye.

“From there, we’ll talk about the constellations and perhaps some deep space objects — distant galaxies and nebulae,” Anderson explained. “I’ll also take questions from the audience, so every program is a little different.”

The former teacher thinks the program he has developed makes the daunting subject much easier for people to grasp.

“Astronomy is one of the harder subjects to learn about through textbooks, because much of it is abstract,” Anderson said. “The planetarium makes it a little more real by immersing its audience in the night sky and allowing them to explore it — inside and during the day.

“First of all, I want everyone to have a good time. Beyond that, I hope that all the audience members take away a little more knowledge of and a greater appreciation for what’s out there, plus perhaps a few things to look for in the real sky.”

Advanced registration for Cosmic Adventures is required. To learn more, call the library at 410-208-4014, or visit www.cosmic-adventures.com.

Article source: http://www.delmarvanow.com/article/20120731/LIFESTYLE/207310389/Look-stars-Ocean-Pines-library

Tags: , , , , <BR/>

Largest-ever Cherenkov telescope sees first light

 

New gamma-eye for the H.E.S.S family: The telescope has a antenna with a diameter of 28 meters and weighs over 6000 tons. Image: H.E.S.S. Collaboration, Clementina Medina/Irfu-CEA

 

On
26 July 2012, the H.E.S.S. II telescope started operation in Namibia.
Dedicated to observing the most violent and extreme phenomena of the
Universe in very high energy gamma-rays, H.E.S.S. II is the largest
Cherenkov telescope ever built, with its 28-meter-sized mirror. Together
with the four smaller (12-m) telescopes already in operation since
2004, the H.E.S.S. (“High Energy Stereoscopic System”) observatory will
continue to define the forefront of ground-based gamma ray astronomy and
will allow deeper understanding of known high-energy cosmic sources
such as supermassive black holes, pulsars and supernovae, and the search
for new classes of high-energy cosmic sources.

With
a mass of almost 600 tons and its 28-m mirror—the area of two tennis
courts—the new arrival is just huge. This very large telescope named
H.E.S.S. II saw its first light at 0:43 a.m. (German time zone) on 26
July 2012, detecting its very first images of atmospheric particle
cascades generated by cosmic gamma rays and by cosmic rays, marking the
next big step in exploring the Southern sky at gamma-ray energies.

“The
new telescope not only provides the largest mirror area among
instruments of this type worldwide, but also resolves the cascade images
at unprecedented detail, with four times more pixels per sky area
compared to the smaller telescopes,” states Pascal Vincent from the
French team responsible for the photo sensor package at the focus of the
mirror.

Gamma
rays are believed to be produced by natural cosmic particle
accelerators such as supermassive black holes, supernovae, pulsars,
binary stars, and maybe even relics of the Big Bang. The universe is
filled with these natural cosmic accelerators, impelling charged
particles such as electrons and ions to energies far beyond what the
particle accelerators built by mankind can reach. As high-energy gamma
rays are secondary products of these cosmic acceleration processes,
gamma ray telescopes allow us to study these high-energy sources.

Today,
well over one hundred cosmic sources of very high-energy gamma rays are
known. With H.E.S.S. II, processes in these objects can be investigated
in superior detail, also anticipating many new sources, as well as new
classes of sources. In particular, H.E.S.S. II will explore the gamma
ray sky at energies in the range of tens of Giga-electronvolts—the
poorly-explored transition regime between space-based instruments and
current ground-based telescopes, with a huge discovery potential.

The
most extreme gamma ray emitters—Active Galactic Nuclei—shine in gamma
rays with an apparent energy output which is one hundred times the
luminosity of the entire Milky Way, yet the radiation seems to emerge
from a volume much smaller than that of our Solar System, and turns on
and off in a matter of minutes, a strong signature of supermassive black
holes. For some of the objects seen with the four H.E.S.S. telescopes
in the last years, no counterpart at other wavelengths is known; they
may represent a new type of celestial object that H.E.S.S. II will help
to characterize.

Images of particle cascades viewed simultaneously by the H.E.S.S. II telescope and by the H.E.S.S. I telescopes. Color encodes light intensity. The image illustrates the dramatically improved intensity and resolution with which H.E.S.S. II views the particle cascades. The H.E.S.S. I cameras are shown in reduced size. Image: H.E.S.S. Collaboration

When
gamma rays interact high up in the atmosphere, they generate a cascade
of secondary particles that can be imaged by the telescopes on the
ground and recorded in their ultra-fast photo sensor ‘cameras’, thanks
to the emission known as Cherenkov radiation—a faint flash of blue
light. The high-tech camera of H.E.S.S. II is able to record this very
faint flash with an “exposure time” of a few billionths of a second,
almost a million times faster than a normal camera. The H.E.S.S. II
camera—with an area of the size of a garage door and a weight of almost 3
tons—is “flying” 36 m above the primary mirror in the focal plane—at
the height of a 20-story building when pointing up. Despite its size,
the new telescope will be able to slew twice as fast as the smaller
telescopes to immediately respond to fast and transient phenomena such
as gamma ray bursts anywhere in the sky.

The
telescope structure and its drive system were designed by engineers in
Germany and South Africa, and produced in Namibia and Germany. The 875
hexagonal mirror facets which make up the huge reflector were
manufactured in Armenia, and individually characterized in Germany. The
mirror alignment system results from a cooperation of German and Polish
institutes. The camera, with its integrated electronics, was designed
and built in France. The construction of the new H.E.S.S. II telescope
was driven and financed largely by German and French institutions, with
significant contributions from Austria, Poland, South Africa and Sweden.

“The
successful commissioning of the new H.E.S.S. II telescope represents a
big step forward for the scientists of H.E.S.S., for the astronomical
community as a whole, and for Southern Africa as a prime location for
this field of astronomy”—so Werner Hofmann, spokesperson of the
project—“H.E.S.S. II also paves the way to the realization of CTA—the
Cherenkov Telescope Array—the next generation instrument ranked top
priority by astroparticle physicists and funding agencies in Europe”.

The
H.E.S.S. observatory has been operated for almost a decade by the
collaboration of more than 170 scientists, from 32 scientific
institutions and 12 different countries: Namibia and South Africa,
Germany, France, the UK, Ireland, Austria, Poland, the Czech Republic,
Sweden, Armenia, and Australia. To date, the H.E.S.S. Collaboration has
published over 100 articles in high-impact scientific journals,
including the Nature and Science journals.

 

H.E.S.S.
was awarded in 2006 the Descartes Prize of the European Commission—the
highest recognition for collaborative research—and in 2010 the
prestigious Rossi Prize of the American Astronomical Society. In a
survey in 2006, H.E.S.S. was ranked the 10th most influential
observatory worldwide, joining the ranks with the Hubble Space Telescope
or the telescopes of the European Southern Observatory ESO in Chile.

More about H.E.S.S. II

Max Planck Institute

Article source: http://www.rdmag.com/News/2012/07/General-Science-Astronomy-Manufacturing-Optics-Largest-ever-Cherenkov-telescope-sees-first-light/

Tags: , , , <BR/>

Telescope Targets Black Holes’ Binges And Burps

The NuSTAR telescope, seen in this artist's illustration, will soon be sending back data that researchers will use to study black holes.
NASA/JPL-Caltech

The NuSTAR telescope, seen in this artist’s illustration, will soon be sending back data that researchers will use to study black holes.

NASA’s newest space telescope will start searching the universe for black holes on Wednesday. Scientists hope the NuSTAR X-ray telescope, which launched about six weeks ago and is now flying about 350 miles above the Earth, will help shed some light on the mysteries of these space oddities.

Mission control for the telescope is a small room on the University of California, Berkeley, campus, where about a dozen people with headsets rarely look up from their screens.

Fiona Harrison, a professor of physics and astronomy at the California Institute of Technology, is the principal scientist for the mission. If there’s one word that describes her past few weeks, it’s “nail-biting,” she says.

The beginning of a space telescope’s life is particularly stressful. It has to be switched on remotely, including the unfurling of a 33-foot arm that will act like a giant telephoto lens.

[Black holes] are sort of the Las Vegas of the universe. What happens in a black hole stays inside of a black hole. But on the outskirts of them, that is where there’s tremendous action.

Now, the $170 million telescope is just about ready to begin its hunt for black holes.

“We’re not actually seeing the black hole,” Harrison says. “What you’re actually seeing is the stuff that’s attracted to it.”

Harrison says they’re called black holes because not even light can escape their gravity. But black holes aren’t passive — they pull in tons of dust and gas. The material swirls around faster and faster, just like a bathtub drain, and gets hotter.

“The material is so hot that it radiates high-energy X-rays,” she says, just like the ones doctors use. She says researchers observed them before, but it’s like reading a book without your glasses.

“We know there’s a story there, we know there’s text, but we haven’t been able to read the letters,” she says.

With NuSTAR, they’ll be able to see these X-rays at a higher resolution than ever before.

“It’s incredibly exciting because we don’t actually know what the text is going to say. And now we’re going to be able to read it clearly for the first time,” she says.

Harrison hopes the telescope will unlock some of the mysteries around black holes — like how they grow.

Eliot Quataert, an astronomy professor at UC Berkeley who is not on the mission staff, says black holes grow just like we do — by eating.

“They eat dramatically, but rarely,” he says.

And at the very center of our galaxy, there’s a super massive black hole that has eaten quite a bit. But we’re still here.

“The misconception that’s out there is that black holes are a vacuum cleaner that will inevitably suck in everything around them,” Quataert says. For the most part, black holes are on a forced diet — they’ve already eaten everything close by.

“But then every once in a while, there will be a lot of gas that gets funneled to the center of a galaxy, and the black hole will grow in a big spurt,” he says.

Quataert says seeing this black hole mealtime with the telescope could reveal more about the extreme physics behind it. That could answer questions about how galaxies form. UC Berkeley astronomer Joshua Bloom hopes NuSTAR will find another strange phenomenon: black hole burps.

More About NuSTAR

This artist's illustration shows what NuSTAR should look like in orbit after its 30-foot-long mast deployed.

VIDEO: Airborne Launch Sends X-Ray Observatory Into Earth Orbit

A 700-pound science satellite roared into orbit Wednesday on a mission to map black holes.

A black hole and its massive pair of jets is seen in association with a growing microquasar in this artist's impression based on multiple sources of telescope data.

“You can think about this black hole burping as if you’re on a feeding frenzy and you can’t fit that many hot dogs in your mouth,” Bloom says.

Early last year, Bloom and other astronomers noticed a black hole devouring a star. The black hole spit out a huge jet of material — a burp. That might sound weird, since nothing can escape a black hole, right?

“These are sort of the Las Vegas of the universe. What happens in a black hole stays inside of a black hole. But on the outskirts of them, that is where there’s tremendous action,” he says.

Bloom says they’re hoping to see more of these rare events and others that are still unknown to astronomers. The NuSTAR space telescope’s mission is expected to last at least two years.

Article source: http://www.npr.org/2012/07/31/157595833/telescope-targets-black-holes-binges-and-burps

Tags: , , , , , <BR/>

Wyman MA ’11 receives American Astronomical Society Awar

Katherine Wyman MA ’11

Katherine Wyman MA ’11

Katherine Wyman MA ’11 was one of only six graduate students nationwide to receive a Chambliss Astronomy Achievement Student Award medal for her poster at the recent 220th meeting of the American Astronomical Society. The awards recognize exemplary research by undergraduate and graduate students who present at one of the poster sessions at the meetings of the AAS.

Wyman’s poster was on the work she did for her master’s thesis with her advisor, Seth Redfield, assistant professor of astronomy. It involved characterizing the gas and dust that the Sun may have passed through over the last tens of millions of years and then constructing a plausible record of the size of the heliosphere over this time scale. The extent of the heliosphere could have consequences for many earthly processes such as atmospheric chemistry, cloud cover, and mutation rates for surface organisms. Redfield notes that he and Wyman are about to submit a paper on this and are planning to write a second one.

The judging process includes not only a critique of the poster, but one-on-one question sessions with reviewers.

Currently, Wyman is employed at the Harvard-Smithsonian Center for Astrophysics.

Article source: http://newsletter.blogs.wesleyan.edu/2012/07/31/wyman/

Tags: , , , , , <BR/>

A century of discoveries

A constant shower of subatomic particles rains down from space. A hundred years ago, Austrian physicist Victor Franz Hess discovered “cosmic radiation.” Among other things, the discovery laid the foundation for a whole new field of research — high-energy physics, which recently gave us the first experimental evidence for the Higgs boson. An anniversary conference will look at the past milestones of cosmic-ray research and future experiments.

When Hess landed his hydrogen balloon at Bad Saarow in the German state of Brandenburg August 7, 1912, he had on board a discovery with far-reaching consequences, which he surely wasn’t fully aware of at the time. On his seventh balloon voyage, equipped with three ionization measuring instruments, Hess had just identified the existence of a pervasive radiation at 17,400 feet (5,300 meters) above Schwieloch Lake in the southeast of Brandenburg. Only later it became evident that this so-called cosmic radiation was comprised mostly of energetic, electrically charged atomic nuclei. The discovery of cosmic rays won Hess the Nobel Prize in Physics 24 years later.

“The detection of the cosmic radiation was the discovery of a century and brought us completely new insights into the cosmos,” said Christian Stegmann from the DESY institute at Zeuthen near Berlin. “Furthermore, it became a cornerstone of early particle physics. Before the development of particle accelerators, cosmic-ray research led to the discovery of many important elementary particles, among them the antiparticle of the electron — the positron — as well as the muon and the pion.”

DESY, the University of Potsdam, and the Max Planck Institute for the History of Science in Berlin are jointly organizing a symposium on the 100th anniversary of the discovery of cosmic rays. From August 6-8, 2012, scientists from all over the world will meet in Bad Saarow, where Hess landed his balloon, to present and discuss the development of various sub-areas ranging from the historic beginnings up to ideas for new projects.

A memorial stone will be unveiled, participants may book balloon flights, and electroscopes that were then used all over the world to carry out ionization measurements will be on display.

“The advent of a centenary is a time for both looking back at the development of the subject and forward: “Where do we go from here?,” said Sir Wolfendale. “Cosmic-ray research has led to new areas of research, including ‘the new astronomies,’ and the future for them is bright, indeed. Neutrino astronomy is on the verge of starting, and gamma-ray astronomy has begun in earnest.”

Physicists expect to gain new insights into the nature of cosmic particle accelerators, which are a million times stronger than the best accelerators on Earth, from gamma-ray astronomy. Single protons from cosmic radiation may have as much energy as a powerfully hit tennis ball, but due to their electric charge, the fast particles are deflected by numerous magnetic fields as they travel through the cosmos. This means that one cannot retrace their point of origin from their direction of flight when they hit Earth.

Therefore, a hundred years since their discovery, the mystery of the origin of cosmic rays is far from being solved. “The universe is full of natural particle accelerators, as for example in supernova explosions, in binary star systems, or in active galactic nuclei. So far, only 150 of these objects are known to us, and we have just an initial physical understanding of these fascinating systems,” said Stegmann.

In contrast to what the name might suggest, cosmic radiation is mostly comprised of particles, but a small fraction is, indeed, gamma radiation, which is not deflected on its way through space and thus points directly to its source. Because physicists expect the sources of cosmic gamma radiation to be the same as for cosmic particles, they are using specialized gamma-ray observatories to hunt for them.

Observatories like H.E.S.S. in Namibia, named in honor of the discoverer of cosmic radiation, MAGIC on the Canary Island La Palma, and VERITAS in the United States, with DESY participation, have detected more than 100 high-energy cosmic gamma-radiation sources. The planned Cerenkov Telescope Array (CTA), for which DESY is currently building a first prototype instrument, will follow this path of discovery. “The Cerenkov Telescope Array will observe thousands of these accelerators with unprecedented sensitivity,” Stegmann said.

Similar to gamma rays, cosmic neutrinos also open a window to the universe’s particle accelerators. Neutrinos are lightweight, electrically neutral elementary particles, which are also not deflected by magnetic fields. This means that the incident path of a neutrino points back directly to its origin. With the participation of DESY, the world’s largest neutrino telescope, IceCube in Antarctica, was finished in December 2010 and has just begun to look for cosmic neutrinos.

“On either route, we expect fascinating insights into the natural particle accelerators in the universe that will throw new light onto the remaining mysteries of cosmic rays,” said Stegmann.

Article source: http://www.astronomy.com/~/link.aspx?_id=7eb093e1-189d-4a7a-9405-5cb1b88b3ece

Tags: , , , , , , <BR/>

Space Ground Amalgam wins NewSpace 2012 Business Plan Competition

Ground Space Amalgam LLC won first place and a $100,000 prize at the second annual NewSpace2012 Business Plan Competition . Second place and $10,000 was awarded to Digital Solid State Propulsion LLC. Honorable mention was given to Terapio Corporation for “providing an unusually commendable technology that will address one of the inherent risks of space settlement.”

The competition entries were from seed, start-up or early-growth firms from the following fields: Entrepreneurial Space, Space-Related, or Space-Scalable. The $100,000 first prize was provided for by a grant from NASA Ames Research Center. Applicants had to be able to explain why their product or service helps with the economic development of space. 55 groups submitted executive summaries and 10 were chosen as finalists. The finalists were assigned coaches and put through a day and a half “boot camp” training session before presenting their business plans at the conference. After giving their six minute presentation, the spokesperson for each team answered questions from the judges.

Space Ground Amalgam provides inflatable satellite reflector components to meet and increase higher industry bandwidth demands, while reducing launch costs and increasing design flexibility. Their technology can also be used for booms and solar arrays. The founders are Rick Sanford, Michael Potter, Chris Stott, Dr. Raz Itzhaki Tamir and Daniel Rockberger. They are seeking funding of $3.5M and their market consists of satellite companies for HDTV, Mobile TV, high-speed Internet, bi-directional cellular, NASA, GPS, military, industry and academia. www.spacegroundamalgam.com

Digital Solid State Propulsion, LLC has created the world’s first “smart energetic materials” that are a game-changing platform technology for diverse industries and applications. DSSP’s high performance electrically controlled solid and liquid propellants replace the 50-year old technologies that are still the industry standards today. The founder is Dr. Wayne Sawka and DSSP is seeking $6M in funding. The target markets are space and tactical rocket propulsion, gun systems, ignition systems, warheads, oil/mining explosives and entertainment pyrotechnics. www.dsspropulsion.com

Terapio Corporation is a bio-pharmaceutical company developing therapeutics based on the membrane-associated RLIP76 protein. Initial applications include developing the RLIP76 protein as a countermeasure for radiation exposure to civilian, military and first responder populations. The founders are consists of Dr. Casey Cunningham, Kevin Lalande and Dr. Sanjay Awasthi. They are seeking $10M in funding. Their target markets include an unmet public safety and national defense need both domestically and abroad, with customers such as the NIH, DoD and NASA. The estimated global market size for radiation countermeasures (RCM) is $400M annually. www.terapio.com

Article source: http://www.examiner.com/article/space-ground-amalgam-wins-newspace-2012-business-plan-competition

Tags: , , , <BR/>

Here’s What Astronauts Will Eat When They Head To Mars

Pizza

Associate Press

Scientists prepare a cheeseless Thai pizza for the Mars menu.

See Also

NASA's New Spacesuits Can Handle The Worst Imaginable Environments

How The New Mars Rover Will Use Chemistry To Search For Martians

Mission Control Will Know The Mars Rover Has Landed When They Hear WILL.I.AM


When the first humans blast off on a mission to Mars around 2030, they’ll need a special spacesuit and a food supply that will last the three-year duration of the trip, including the six months its takes to travel there and another six back.  

Ramit Plushnick-Masti of the AP recently spoke with Maya Cooper, a senior research scientist with Lockheed Martin who is in charge of coming up with tasty and nutritious food options for the small space crew.

One thing that won’t be appearing on the menu is meat or dairy, since there’s no way to provide a fresh milk supply. Astronauts will have to stick with a strictly vegetarian diet packed with vitamins and minerals that keep the crew members in good physical and psychological health. 

According to the article, Cooper’s team has already cooked up around 100 recipes, including many tofu- and nut-heavy dishes. The Mars-bound crew can also look forward to a Thai pizza (cheeseless of course) that is topped with carrots, red peppers, mushrooms, scallions, peanuts and a spicy homemade sauce.  

About $1 million is spent each year on developing the Mars menu.  

Read the full article here  

SEE ALSO: Why Astronauts Crave Hot Sauce  

Article source: http://www.businessinsider.com/nasa-mars-menu-2012-7

Tags: , , , <BR/>

NASA to athletic Mars rover: ‘Stick the landing’

PASADENA — It’s NASA’s most ambitious and expensive Mars mission yet — and it begins with the Red Planet arrival late Sunday of the smartest interplanetary rover ever built. Also the most athletic.

Like an Olympic gymnast, it needs to “stick the landing.”

It won’t be easy. The complicated touchdown NASA designed for the Curiosity rover is so risky it’s been described as “seven minutes of terror” — the time it takes to go from 13,000 mph to a complete stop.

Scientists and engineers will be waiting anxiously 154 million miles away as the spacecraft plunges through Mars’ thin atmosphere, and in a new twist, attempts to slowly lower the rover to the bottom of a crater with cables.

By the time Earthlings receive first word of its fate, it will have planted six wheels on the ground — or tumbled itself into a metal graveyard.

If it succeeds, a video camera aboard the rover will have captured the most dramatic minutes for the first filming of a landing on another planet.

“It would be a major technological step forward if it works. It’s a big gamble,” said American University space policy analyst Howard McCurdy.

The future direction of Mars exploration is hanging on the outcome of this $2.5 billion science project to determine whether the environment was once suitable for microbes to live. Previous missions have found ice and signs that water once flowed. Curiosity will drill into rocks and soil in search of

carbon and other elements.

Named for the Roman god of war, Mars is unforgiving with a hostile history of swallowing man-made spacecraft. It’s tough to fly there and even tougher to touch down. More than half of humanity’s attempts to land on Mars have ended in disaster. Only the U.S. has tasted success, but there’s no guarantee this time.

“You’ve done everything that you can think of to ensure mission success, but Mars can still throw you a curve,” said former NASA Mars czar Scott Hubbard, who now teaches at Stanford University.

The Mini Cooper-sized spacecraft traveled 8½ months to reach Mars. In a sort of celestial acrobatics, Curiosity will twist, turn and perform other maneuvers throughout the seven-minute thrill ride to the surface.

Why is NASA attempting such a daredevil move? It had little choice. Earlier spacecraft dropped to the Martian surface like a rock, swaddled in air bags, and bounced to a stop. Such was the case with the much smaller and lighter rovers Spirit and Opportunity in 2004.

At nearly 2,000 pounds, Curiosity is too heavy, so engineers had to come up with a new way to land. Friction from the thin atmosphere isn’t enough to slow down the spacecraft without some help.

During its fiery plunge, Curiosity will brake by executing a series of S-curves — similar to how the space shuttle re-entered Earth’s atmosphere. At 900 mph, it will unfurl its huge parachute. It then will shed the heat shield that took the brunt of the atmospheric friction and switch on its ground-sensing radar.

A mile from the surface, Curiosity will jettison the parachute and fire up its rocket-powered backpack to slow it down until it hovers. Cables will unspool from the backpack and slowly lower the rover — at less than 2 mph. The cables keep the rocket engines from getting too close and kicking up dust.

Once the rover senses touchdown, the cords will be cut.

Even if the intricate choreography goes according to script, a freak dust storm, sudden gust of wind or other problem can mar the landing.

“The degree of difficulty is above a 10,” said Adam Steltzner, an engineer at NASA’s Jet Propulsion Laboratory, which manages the mission.

It takes 14 minutes for radio signals on Mars to travel to Earth. The lag means Curiosity will already be alive or dead by the time mission control finds out.

The rover’s landing target is Gale Crater near the Martian equator. It’s an ancient depression about the size of Connecticut and Rhode Island combined with a 3-mile-high mountain rising from the center of the crater floor.

Scientists know Gale was once waterlogged. Images from space reveal mineral signatures of clays and sulfate salts, which form in the presence of water, in older layers near the bottom of the mountain.

During its two-year exploration, the plutonium-powered Curiosity will climb the lower mountain flanks to probe the deposits. As sophisticated as the rover is, it cannot search for life. Instead, it carries a toolbox including a power drill, rock-zapping laser and mobile chemistry lab to sniff for organic compounds, considered the chemical building blocks of life. It also has cameras to take panoramic photos.

Humans have been mesmerized by the fourth rock from the sun since the 19th century, when American astronomer Percival Lowell, peering through a telescope, theorized that intelligent beings carved what looked like irrigation canals. Scientists now think that if life existed on Mars — a big if — it would be in the form of microbes.

Curiosity will explore whether the crater ever had the right environment for microorganisms to take hold.

Even before landing, it got busy taking radiation readings in space during its 352 million-mile cruise — information that should help its handlers back home determine the radiation risk to astronauts who eventually travel to the Red Planet.

Article source: http://www.mercurynews.com/nation-world/ci_21195925/nasa-athletic-mars-rover-stick-landing

Tags: , , , , , <BR/>

Colombia: Indigenous Nasa Resist Militarization in Cauca

Source: Fellowship of Reconciliation

On July 11, the indigenous Nasa of Cauca, Colombia began confronting armed groups face-to-face while peacefully asking them to leave Nasa territories. They removed police trenches from the urban center and disassembled homemade FARC missiles found on their lands. Four hundred Nasa members occupied and observed army soldiers on the sacred indigenous site of El Berlin outside of Toribío, where the army is protecting private cell phone company towers.

On July 16, when the military had yet to retreat from indigenous lands by the proposed deadline of the previous day, the Nasa forcibly removed troops from El Berlin’s mountaintop base. Dramatic photos of the event splashed across national and international news, some featuring members of the Nasa indigenous community surrounding several soldiers, picking them up, and moving them away from their posts and others featuring crying Colombian officer Sergeant Garcia, retreating from the encampment.

The municipality of Toribío in the Colombian department of Cauca has become emblematic of complexities in the war that continues to plague the country. Toribío is one of 19 indigenous communities that make up the Pueblo Nasa, the very well organized and pacifist indigenous community located in the North of Cauca. The Nasa’s ancestral lands are rich in natural resources exploited by multinationals as well as located in a strategic corridor for both illegal and legal trade, which both recently and historically have put the civilian population in the midst of the armed conflict; Toribío alone has been hit with combat over 500 times in the last ten years and the FARC guerrillas attacked 12 times in the first half of July alone. The Inter-American Commission of Human Rights has issued protective measures for the Nasa reservation.

“The community of Toribío has learned how to live in the midst of conflict,” relates a recent Nasa communication. “They have survived both FARC and army attacks. The children have learned to pass through police blockades on their way to school.” The investigative journalist site Silla Vacia pointed out, “The Nasa have been urging respect from armed actors for twenty years, but not from Bogota or any other large city like most of us do, no, but rather face to face.”

The constant threat from armed groups reached a breaking point at the start of July. After a week of intense battles between the armed forces and the FARC in the town of Toribío, all amidst the indigenous and civilian populations, the Association of Indigenous Councils of Northern Cauca (ACIN) and the Regional Indigenous Council of Cauca (CRIC) called for an end to fighting between the security forces and the FARC. They published an open letter to all armed actors, calling for them to leave the indigenous territories.

The indigenous right to self-governance is constitutionally recognized in Colombia and the Nasa are protected by the Indigenous Guard, a community self-defense movement authorized by the autonomous community which holds their own internal justice processes and provides peaceful security to inhabitants. The Indigenous Guard is armed with ceremonial staffs. Under Colombian and international law, the construction of military bases within indigenous territories requires free, prior and informed consent from the community, a requirement that the Nasa claim was not respected.

The ACIN’s open letter, published on July 8, demanded the departure of all combating armed groups: “We declare ourselves in permanent resistance until all armed groups and armies leave our homelands… we are not going to leave; those who need to leave are the legal and illegal armed groups who continue to sow death in our territory.”

The letter cited displacement, injuries, death, threats, impunity, mined crops, lost crops, rapes, disrespect and disruption to civil society as a few of the reasons why the ACIN reached a point where they are calling for no more war or armed groups in the territory and an end to the invasion of their ancestral lands. The open letter continued, “We will not stand with our arms crossed watching as they kill us and destroy our territories, communities, life, and autonomous organization,” and outlined the plan of the indigenous population to peacefully confront the different armed groups and ask them to leave until there is harmony throughout their lands.

The same day the Nasa occupied the army encampment in El Berlin, President Juan Manuel Santos visited Toribío to reassure the local and national population of the army’s control of the region and the security they provide all citizens there. The visit wasn’t entirely successful. Despite the president’s heavy security and additional militarization that accompanied his visit, the FARC managed to mount two separate road blockades on the Pan-American highway less than three miles from where the president spoke. Guerrillas stopped cars on their way to the event, including press vehicles. As the political magazine Semana reported, FARC gunmen said to the drivers, “Tell the president that in order to get to Toribío you had to pass through a blockade of the FARC’s 6th Front.”

FARC troops shot at army helicopters flying overhead, heard in the background of the televised version of the president’s speech about security in the region. The crowd reportedly booed the president when he asserted he would not order the military to vacate the nine towns that the Nasa requested they leave. The government rejected any possibility of a troop pullout. Instead, it is reorganizing military forces in the region to operate as a joint command with 5,000 troops for three southwestern provinces affected by leftist rebels, drug traffickers and paramilitaries. Two of these forces will be in Cauca. After the President’s visit, the ACIN lamented that, “it has become clear the response of the national government is to continue to implement its war strategy in spite of our indigenous communities’ pleas and resistance to this.”

On July 14, the ACIN declared northern Cauca to be in a humanitarian emergency, citing serious effects the war is having on civilians in indigenous territories due to “constant infractions of international human rights law that both the State as well as the FARC commit.” ACIN claims that the war has escalated this year with 118 human rights violations in their territory between January 1 and June 30. It also detailed the recent mass displacement of civilians by prolonged combat in the middle of populated areas and the forced involvement of civilians in the war. Denouncing both the FARC and the armed forces, ACIN details the violence that led to the state of emergency.

The statement also reaffirms the Nasa position of autonomy for their communities, reiterates the need to remove FARC blockades and trenches and armed forces encampments and bases, and urges the two main armed groups to engage in dialogue for peace. They urged the national government to recognize their right to govern themselves, as outlined in the United Nations Declaration on Human Rights for Indigenous Peoples, pointing out that far from providing security, “the army puts the civilian population at risk.” They asked that the armed groups respect the Nasa’s right to demilitarize their lands from the national police and army as well as the insurgent groups.

The Nasa also expressed distress about the mass media’s coverage of the events unfolding in Cauca. “The press promotes a sentiment of racism, segregation, and intransigence for the citizens of Cauca and has slandered the good name of the CRIC as well as violated the right of the public to be well informed, a recurring situation in the Colombian press,” the CRIC said. The organization rightfully accuses the mass media of strengthening rumors and perpetuating a dangerous idea that indigenous people work with the FARC. The way the reporters frame the issues in their territories, CRIC says, paint anyone of the indigenous movement who criticizes the government as in favor of terrorism. We have seen in FOR how the stigmatization of communities in resistance to the war in Colombia can bring grave consequences, particularly when they become public opinion. We are concerned about the media coverage of the unfolding events in Cauca, particularly around the indigenous removal of military from El Berlin.

The media blitz covered the incident with criticisms to the Nasa for the ‘less than peaceful’ removal of the military base. The harshest criticisms and accusations came from the Colombian armed forces and the state. General Jorge Humberto Jerez claimed on national radio that the Nasa had “mistreated the soldiers, burned army rations and held troops hostage with the FARC.”

President Juan Manuel Santos said, “we will not tolerate attacks against those who defend us,” and later posted on his Twitter account, “I don’t want to see a single indigenous person on an army base.” Defense Minister Juan Carlos Pinzon said that indigenous groups had been infiltrated by the rebels: “We know that this is what the FARC want, to generate a confrontation, but our army is professional.”

According to ACIN, however, the removal of the army from their lands was not violent. They claim that 2,500 indigenous people participated in the peaceful protest and used legitimate force when six soldiers and one sergeant refused to leave. They explain that there were no individuals from either party hurt, and refuted press reports that the Nasa hit the soldiers with staffs and stones during the removal of the soldiers. They also refute accusations that they burned or destroyed material possessions of the brigade. They went on to say they “deeply regret having to use force to realize a constitutional right,” but maintain that their protest was peaceful. The military temporarily withdrew from the base, but eventually retook the facility using tear gas to disperse the protesters.

In the aftermath of this dramatic event, not only were there strong statements stigmatizing and delegitimizing the indigenous movement from the press and government, but Colombian soldiers have killed civilians in Cauca. Just days later, the armed forces shot and killed a civilian man when he ignored orders to stop at a nearby military roadblock. On July 18, army soldiers shot and killed eighteen-year-old Nasa man, Eduar Fabian Guetio Vásquez without warning while he was walking home. The commander of the Third Division of the Army was relieved of his post as a result of the second murder. The Nasa have requested that the soldiers responsible for these crimes be tried in a civilian court, but have not received an official response to this request.

Also on July 18, Nasa’s Indigenous Guard detained FARC members in possession of explosives and guns on their land. ACIN urged the FARC’s national commander Timoleón Jiménez to order his troops to leave their land: “As we have always said, we do not accept insurgent forces in our territories. We do not want a FARC presence, nor any presence of any army, because these are our territories since the beginning of time. We do not want your presence because the guerrillas do not bring us tranquility; you attack the civilian population, you disrespect our authority and our justice. Leave the indigenous territories in Cauca. Stop the war. We are all losing.”

The sheer bravery involved in forcibly removing illegal armed groups and the national army from their territories, all in peaceful demonstration and while unarmed, speaks to just how exhausted and overwhelmed the indigenous population of Cauca is with the war ravaging the region. The continued assertion by the government that the armed forces are providing protection and their projected plans to more heavily militarize the zone in the coming weeks, despite the indigenous protest of militarization and repeated calls for peace in their region, shows the disconnect between the state and the civilian population.

International political and human rights organizations such as the Colombian Support Network, Witness for Peace, and political organizations such as WOLA and LAWG have issued statements of support for the ACIN and the Toribío community residents in resistance to militarization. National human rights groups and other communities in resistance, including the Peace Community of San Jose de Apartadó, have sent letters of support. The Inter-American Commission of Human Rights has reinforced the right of the Nasa to control their lands, and human rights organizations are urging the Colombian government to respect the Nasa’s constitutional rights as well as the international law regarding the rights of civilians in conflict zones.

Senator Ivan Cepeda rhetorically asked President Santos on July 25 why he opened the legislative session with a homage to Sergeant Garcia, (the commander heavily photographed in the Berlin Hill incident) and forgot to do the same for the indigenous in the region. “The indigenous are the victims and not the victimizers,” Cepeda said.

The government was scheduled to sit down with Nasa indigenous leaders in the last week of July. The whole nation watched to see what would become of their meeting.

Article source: http://upsidedownworld.org/main/colombia-archives-61/3790-colombia-indigenous-nasa-resist-militarization-in-cauca