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NASA: Pluto is 'not simply a ball of ice and rock' PDF Print E-mail

NASA released new photos today of everyone's favorite former planet: Pluto.

The space agency says the photos, which were taken in the early 2000s by the Hubble Space Telescope, are the "most detailed and dramatic images ever taken of the distant dwarf planet."

"The Hubble pictures confirm Pluto is a dynamic world that undergoes dramatic atmospheric changes not simply a ball of ice and rock," NASA says in a news release.

But the new glamour shots won't be enough to get Pluto registered again as a planet.

The pictures come just as Pluto is heading into a new phase of its 248-year orbit around the sun, NASA says:

Pluto is unlike Earth, where the planet's tilt alone drives seasons. Pluto's seasons are asymmetric because of its elliptical orbit. Spring transitions to polar summer quickly in the northern hemisphere, because Pluto is moving faster along its orbit when it is closer to the Sun.

Space.com says new colors and features of Pluto came to light in the photos:

The surface appears reddish, yellowish, grayish in places, with a mysterious bright spot that is particularly puzzling to scientists.

Some of the colors revealed in the new pictures of Pluto are thought to result from ultraviolet radiation from the sun interacting with methane in the tenuous atmosphere of the dwarf planet. The bright spot apparent near the equator has been found in other observations to be unusually rich in carbon monoxide frost.

Pluto lost its status as our solar system's ninth planet in 2006 when an international group of scientists decided that it was too small and too distant to be considered a member of the Earth's solar-system family.

More from the National Academies:

Pluto is considerably smaller and more distant than the other planets in our solar system. Two-thirds the size of Earth's moon, Pluto's classification as a planet came under scrutiny when many objects of similar size and distance were discovered in the Kuiper Belt in the 1990s.

Read more: http://www.zimbio.com/NASA/articles/f5hU8Z52lL3/NASA+Pluto+not+simply+ball+ice+rock

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NASA Tests Handy-Man Space Robots For Orbital Repairs PDF Print E-mail

With cuts in the manned space program and the impending retirement of the Space Shuttle, NASA will soon face the need to repair satellites without the ability to send any astronauts to do it. Fortunately, they’re already working on the solution: robots.

Over the next seven months, NASA will finish installing the Dextre robot on the International Space Station (ISS). Once fully affixed to the ISS, Dextre, which previously helped astronauts repair the Hubble Space Telescope, will practice refueling satellites.

Once complete, Dextre will remove insulation from the outside of the ISS, disconnect safety wires, and eventually dock with and pump fuel through fuel ports on the ISS. The ISS fuel ports resemble the ports on most satellites, so Dextre’s operators can test different configurations for problems and efficiency.

For satellites, refueling represents a particular problem. Since the main operations of satellites rely on solar power, compared with the limited monopropellant fuel in the booster rockets, most satellites will run out of fuel long before some other component fails. That leaves refueling as a critical task in extending the life of a satellite. Where this refueling will actually take place, should the current tests prove successful, is still up for debate. We’re advocating fitting Dextre with his own rocket boosters (and maybe some coveralls), turning him into Earth orbit’s very own roaming full-service filling station.

With over 3,000 satellites currently orbiting the Earth, the need for repair work is higher than ever. By deploying robots to perform those repair, refueling, and reconfiguration tasks, NASA will save money, reduce the danger to astronauts, and free up humans for more ambitious and scientifically significant missions.

[Discovery News]

Read the original post:
NASA Tests Handy-Man Space Robots For Orbital Repairs

Related posts:

  1. Next for NASA: Inflatable Space Stations, In-Orbit Refueling, Space UAVs and More
  2. Robotic Arm on Space Station Will Try Refueling a Satellite
  3. NASA Tests All-Composite Material Version of its Orion Space Module

Read more: http://www.zimbio.com/NASA/articles/OQrPW4i0nzP/NASA+Tests+Handy+Man+Space+Robots+Orbital

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An Astronaut Peeks Out from the Space Station’s Lovely New 360-Degree Window PDF Print E-mail

I see you, space shuttle. Space shuttle Endeavour has landed safely after installing a new observation deck on the International Space Station. But the Endeavour astronauts didn’t leave without first checking out the new view from the cupola window.

Here we get a view of George Zamka, NASA astronaut and STS-130 commander, peeking out from the newly-installed cupola on February 19 while the space shuttle remained docked with the space station. ISS resident Soichi Noguchi has already made good use of the cupola to take pretty Earth Twitpics with his 800mm lens camera.

Speaking of Noguchi, the astronaut also took advantage of his fresh vantage point to capture this stunning image of the space shuttle making an s-turn while undergoing atmospheric reentry on its return home.

Besides providing stunning sights, the cupola gives ISS residents a better view to control the space station’s robotic arm. That feature should come in handy, considering that NASA’s new budget has extended the space station lifetime until at least 2020.

Excerpt from:
An Astronaut Peeks Out from the Space Station’s Lovely New 360-Degree Window

Related posts:

  1. The Amazing View from the International Space Station’s Brand New Window
  2. Japanese Astronaut to Serve First Sushi in Space
  3. Take a tour of the International Space Station, right here

Read more: http://www.zimbio.com/NASA/articles/JJOfg8JlYAL/Astronaut+Peeks+Out+Space+Station+Lovely+New

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Shuttle Endeavour PDF Print E-mail

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The crew aboard space shuttle Endeavour includes an accomplished musician whose latest exploits are with the cello and steel guitar, an engineer who helped launch shuttles and a second-generation space program worker. A brief look at the five men and one woman en route to the International Space Station:

Commander George Zamka is personally delivering some special rocks to the International Space Station: four chips from the moon and a stone from the top of Mount Everest.

The fragments of moon rock were gathered by Neil Armstrong and Buzz Aldrin in 1969, and carried up Mount Everest by a former shuttle astronaut last spring. Zamka accepted the rocks last month and said he would make sure they got into the new space station compartments flying up on Endeavour. They will serve, he said, "as a reminder to all of the astronauts who are up there, what human beings can do and what our challenges are."

This is Zamka's second spaceflight in his 12 years as an astronaut.

The 47-year-old Marine colonel grew up in New York, Rochester Hills, Mich., and Medellin, Colombia, his mother's hometown. He recalls watching planes fly over his Medellin school on final approach to the airport. It was "a great enticement" for pursuing an aviation career. His Colombian pilot uncle also was an influence.

Zamka went on to become a fighter pilot. He and wife Elisa have a 15-year-old girl and 8-year-old boy.

Pilot Terry Virts' childhood revolved around the space program.

He grew up in Columbia, Md., not far from Goddard Space Flight Center, where his parents worked. Mom was a secretary, and dad was a technician for NASA's Landsat satellites.

Virts, 42, said his first book as a child was about the Apollo moon landings and his bedroom was adorned with rocket and airplane posters. He'd occasionally accompany his father to the satellite control room at Goddard in the 1970s.

"It's kind of strange, from being a little kid there at NASA, and now here I am," he said.

Virts joined the Air Force and became a fighter pilot and, ultimately, a colonel. NASA picked him as an astronaut in 2000. He's waited 10 years for his first spaceflight.

He acknowledges "it's obviously a dangerous thing," but draws strength from the weekly prayers offered up for him at his church and his children's school back home in Houston. Wife Stacy is a substitute teacher. They have an 8-year-old girl and 11-year-old boy.

Stephen Robinson's last two shuttle flights were high on the media radar. John Glenn was his crew mate in 1998, and his next mission in 2005 was the first to follow the Columbia disaster.

So he's enjoying the low profile this time around.

"I prefer to be on the side of the camera that isn't shining," Robinson said.

Robinson, 54, a mechanical engineer from Sacramento, Calif., started working for NASA in 1975 while in college. After stints as a graphic artist, surveyor and radio DJ, he signed on full time in 1979 as a research scientist. The astronaut corps came calling in 1995. This is his fourth shuttle mission.

Robinson will supervise the three spacewalks from inside. On his last flight, he had to venture beneath the shuttle's belly to remove some fabric that was jutting out, so he and his crew could return safely to Earth. Monitoring from inside this time is like being an air traffic controller, he said, or an orchestra conductor.

Speaking of music, Robinson plays in two bands and is learning the steel guitar and cello. He plans to serenade his crew mates in orbit, playing the guitar that's already at the space station.

Kay Hire used to launch space shuttles. Now she flies in them.

The 50-year-old Navy Reserve captain is making her second space flight — and her first in 12 years.

She grew up in Mobile, Ala., the daughter of a land surveyor. She'd use her father's surveying equipment to look at craters on the moon. "I was just totally fascinated" with space, she said.

Hire was commissioned as a Naval officer in 1981 and, 12 years later, became the first woman in the U.S. military to be assigned to a combat air crew. She took part in Atlantic and Caribbean patrol operations.

She began working at Kennedy Space Center in 1989 as an engineer and became an astronaut in 1995. She rocketed into orbit in 1998, then was recalled to active naval duty.

Hire will help operate the shuttle robot arm and raise the window shutters of the new space station lookout, once it's in the proper place. The domed observation deck will offer panoramic views of Earth and outer space.

"Honestly, I'm not really hung up on being the first one" to look out the windows, she said, "just so long as I get a view at some point."

As the son of a construction worker, Robert Behnken grew up riding in dump trucks and on backhoes, long before Bob the Builder.

Now, he really is Bob the Builder, tackling the last major construction job at the International Space Station. As lead spacewalker, he will venture outside three times, helping to install a new space station room as well as a lookout.

The mechanical aptitude he picked up as a child in St. Ann, Mo., is paying off now. "It really does match up well," he said.

Behnken, 39, who has a Ph.D. in mechanical engineering, is making his second shuttle flight in two years. He became an astronaut in 2000.

He is married to astronaut Megan McArthur, who flew to the Hubble Space Telescope in May. They had been married just a month in 2008 when Hurricane Ike submerged their Houston home with 3 feet of water. Their new house is almost finished — on the same property, but with flood guards.

British-born Nicholas Patrick was inspired by the Apollo moon landings, so much so that he left England to pursue a career in aviation and aerospace.

After working for General Electric and Boeing as an engineer, Patrick was selected by NASA as an astronaut in 1998. He flew to the space station in 2006.

Patrick, 45, will perform three spacewalks on this mission, helping to install a new room at the International Space Station. He will undo the big bolts holding down the window shutters on the new observation deck and, once the shutters are cranked open from inside, take pleasure in looking at the nine faces looking out at him.

The space station is "as big as it's ever been, and we'll make it bigger," he said.

His wife, Dr. Rossanna Palomino, is a pediatrician. They have two boys and one girl, ages 3 to 7.

He was born in North Yorkshire and became a U.S. citizen in 1994.

On the Net:

NASA: http://www.jsc.nasa.gov/Bios/

Read more: http://www.zimbio.com/NASA/articles/T6Dwuu7C13x/5+men+1+woman+aboard+shuttle+Endeavour

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Obama Budget : NASA budget for 2011 eliminates funds for manned lunar missions PDF Print E-mail

NASA budget

NASA’s grand plan to return to the moon, built on President George W. Bush’s vision of an ambitious new chapter in space exploration, is about to vanish with hardly a whimper. With the release Monday of President Obama’s budget request, NASA will finally get the new administration’s marching orders, and there won’t be anything in there about flying to the moon.
The budget numbers will show that the administration effectively plans to kill the Constellation program that called for a return to the moon by 2020. The budget, expected to increase slightly over the current $18.7 billion, is also a death knell for the Ares 1 rocket, NASA’s planned successor to the space shuttle. The agency has spent billions developing the rocket, which is still years from its first scheduled crew flight.

read full article: NASA budget for 2011 eliminates funds for manned lunar missions
washingtonpost.com

Related Posts

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Hubble Unravels Odd Galaxy’s History PDF Print E-mail

hubble-pic-small

Not all spiral galaxies look or behave alike, as this new image from the Hubble Space Telescope of the unusual galaxy NGC 2976 shows.

With this new detailed view, astronomers were able to use the brightness and color of its stars to reconstruct the galaxy’s history.

The galaxy, which is located 12 million light-years away in the constellation Ursa Major, has been shaped by its interaction with the M81 group of galaxies. M81 set off star birth in the distant past, but about 500 million years ago, new stars stopped bursting into existence through the outer galaxy. Some of the galaxy’s gas was stripped away, and the rest collapsed to the center, leaving just a region 5,000 light-years wide near the core that is still making stars.

What look like grains of sand are individual stars. Blue giant stars highlight where the remaining active starmaking regions exist.

Image: NASA/ESA/J. Dalcanton/B. Williams. XXL image.

See Also:

WiSci 2.0: Alexis Madrigal’s Twitter, Google Reader feed, and green tech history research site; Wired Science on Twitter and Facebook.

Read more: http://www.wired.com/wiredscience/2010/01/hubble-unravels-odd-galaxys-history/

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Simulating the Cosmic Web PDF Print E-mail

Quantum Darwinism can explain the nature of classical reality. But is it really a form of natural selection or just an imposter?

The beautiful tapestry of filaments, sheets, and voids in the Cosmic Web is proving harder to model than anybody thought.

The idea that stars clump together in "island universes" is relatively new to astronomy. It was only in the 1920s and '30s that astronomers agreed among themselves that "galaxies" must be separated by vast distances.

But only in the last 10 years or so have astronomers discovered that galaxies themselves form into a far larger structure. The 100 billion galaxies that we know about are woven into a wispy web-like arrangement consisting of dense compact clusters, elongated filaments and sheet-like walls, amid large near-empty void regions.

This structure has become known as the Cosmic Web and one of the great challenges in modern cosmology is to accurately model and simulate it.

That's turning out to be tricky.

One of the important features of the Cosmic Web is that its structures range over many orders of magnitude. And since the largest structures, such as the wall-like features, are formed out of the smaller ones such as filaments and clusters, it's crucial that any model can handle the relationship between them at all these scales.

That's easier said than done. One way to imagine the problem is to think about zooming out from a particular cluster of galaxies to show the larger structures, rather in the manner of the famous Powers of Ten movie made in the 1970s.

As the small scale structures become too small to resolve, most computer models apply some kind of statistical smoothing process to make the large scale calculations easier.

But if you zoom back in again, there is no way to retrieve the information that is lost by the smoothing process, other than to rebuild the picture again from the original data.

That's okay if all you want is a 3-D model of the universe. But it's a problem if you want to simulate how the large scale structures form from smaller structures and how, in turn, the shape of the large structures influences the way smaller structures evolve.

This kind of feedback process is impossible to model when the smoothing process between different scales essentially destroys any meaningful links between them.

Enter Rien van de Weygaert and Willem Schaap at the University of Groningen in the Netherlands. These guys have developed a way of modeling structures over many scales without the unnatural smoothing that other approaches use.

Their trick is to think of galaxies as points in 3D space and to fill the space between them with tetrahedra. These tetrahedra must be constructed in such a way that, if a sphere were inflated inside each one until it touched the sides, there would be no galaxies inside each sphere.

This is known as a Delauney tessellation. What's special about Delauney tessellations is that as the scale gets larger, there are rules for combining the tetrahedra into larger ones. These rules are special because they are reversible, meaning that the important features of the original structure can be reconstructed when you zoom in again.

That makes it much easier to simualte the feedback between structures on various scales.

So it's no surprise that astronomers are excited about the potential of the so-called Delaunay Tessellation Field Estimator (DTFE). If you want to know more, de Weygaert and a few mates give a comprehensive outline of the idea on the arXiv today.

It should mean that we'll have a much better model of the large scale structure of the universe.

It should also mean that we can update the Powers of Ten movie which, understandably given its age, shows no detail in the universe beyond our local cluster of galaxies.

Ref: arxiv.org/abs/0912.3448: Geometry and Morphology of the Cosmic Web: Analyzing Spatial Patterns in the Universe



Read more: http://feeds.technologyreview.com/click.phdo?i=1e4df6e7ef76aff2073557f9172ded63

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