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சனி, 26 மார்ச், 2011

நாஸா புகைப்படங்கள்




Backdropped by Earth's white clouds and blue water, the space shuttle Discovery 

can be seen approaching the International Space Station for a final time on Feb. 26. 

A Russian Progress spacecraft that is docked to the station points downward toward

the shuttle in  this photo, which was captured by a station crew member.


Space shuttle Discovery arrived at the International Space Station on Saturday, 

making its final visit before being parked at a museum.




Swirls of ice

Ostrov Shikotan is a volcanic island at the southern end of the Kuril chain, off the coast 
of the Russian Far East. Shikotan lies along the extreme southern edge of winter sea ice
 in the Northern Hemisphere. An imager on NASA's Earth Observing-1 (EO-1)
 satellite captured this natural-color image of Shikotan on Feb. 14. The island 
is surrounded by swirling shapes of ghostly blue-gray sea ice.



Pool practice

With the aid of scuba divers, spacesuit-clad astronaut trainees take part in drills 
in a pool at Russia's Star City cosmonaut training center outside Moscow on Feb. 18.
 Underwater training simulates conditions of weightlessness and is a part of 
space crew training.



Monster blast from the sun

When an M-3.6-class flare occurred near the edge of the sun, it blew out a gorgeous, 
waving mass of erupting plasma that swirled and twisted over a 90-minute period on
 Feb. 24. The event was captured in extreme ultraviolet light by NASA's Solar Dynamics 
Observatory. Some of the material blew out into space, and other portions fell back to the 
surface.



Saturn's northern storm

As part of its routine monitoring of Saturn's atmosphere, the Cassini orbiter took the 
photos needed to compose this false-color composite view of the storm reaching 
across much of the planet's temperate northern latitudes on Feb. 4. The view is made 
up of three images taken through infrared, green and blue filters.


Getting ready for a walk

Discovery astronaut Alvin Drew prepares to go on a spacewalk in this Feb. 28 picture, 
which shows an area partially inside and partially outside the International Space Station's 
Quest air lock. Drew and fellow spacewalker Steve Bowen took on a variety of maintenance 
tasks during the shuttle Discovery's final visit to the space station.

Story


A robotic system shutdown interrupted Monday's spacewalk outside the International

 Space Station, leaving an astronaut stuck with an 800-pound (363-kilogram) pump in

 his hands for nearly a half-hour. Good thing it was weightless.








Welcomed with open arms

The International Space Station's robotic arm is extended toward a Japanese 
cargo ship known as Kounotori 2. The Japan Aerospace Exploration Agency says
 the transport vehicle was brought in for docking on Jan. 27. The vehicle carried nearly
 six tons of food, water, clothing and experimental equipment for the station's astronauts.

Story

Month in Space: February 2011
An unmanned Japanese cargo spaceship safely arrived at the International Space 

Station on Thursday, delivering tons of provisions for the station and its crew members.





Light show

The northern lights are seen in the sky above the village of Ersfjordbotn near
 Tromso in northern Norway, early on the night on Feb. 21. Such auroral displays
 are caused by the interaction between electrically charged particles from the sun 
and gas molecules in the upper atmosphere of the Earth, about 60 miles up.



Ready for landing

This enhanced-color image shows Holden Crater on Mars, one of the four candidates 
being considered as a landing site for NASA's Curiosity rover. The rover is due for
 launch later this year. The high-resolution camera on NASA's Mars Reconnaissance 
Orbiter, known as HiRISE, has taken color imagery of all four sites so that scientists 
can decide which site is most promising. This view of Holden Crater was released 
on Feb. 16.




Walking on a mock Mars

A mock mission to Mars "landed" on a simulated Red Planet on Feb. 14, and in the 
days afterward, volunteer crew members went on three make-believe Marswalks.
 The simulated surface was actually a giant sandpit, built inside a Moscow research 
institute. The exercise was the climax of a 520-day isolation experiment aimed at 
studying how a future real-life crew would handle the psychological stresses of a
 Mars mission.

Story


The crew of a simulated international Mars mission took their first steps on an indoor

Red Planet landscape marking the halfway point in an ambitious 520-day isolation

 experiment to test the strains of interplanetary travel.






A ring of black holes

This composite image, released Feb. 9, shows Arp 147, a pair of interacting galaxies 
located about 430 million light years from Earth. X-ray observations from NASA's 
Chandra X-ray Observatory are shown in pink, and visible-light readings from the
 Hubble Space Telescope are shown in red, green and blue. Scientists say the pink
 bursts in the ring-shaped galaxies are emissions from black holes.


Story

Head-on galactic collision is an impressive sight
From the perspective of any random star in a galaxy, a head-on galactic collision 

isn't a particularly violent event. Stars are spaced so widely apart that they won't
 
actually collide with each other. Instead, a galaxy collision






A grand galaxy

This Hubble Space Telescope image, released on Feb.17, shows the majestic disk
 of stars and dust lanes in the spiral galaxy NGC 2841. A bright cusp of starlight marks
 the galaxy's center.



Jumpin' Jupiter

Particle debris in Jupiter's atmosphere is seen after an object hurtled into the atmosphere 
on July 19, 2009, in these infrared images obtained from NASA's Infrared Telescope
 Facility in Mauna Kea, Hawaii, and released by NASA on Jan. 26, 2011. The image 
on the left was taken July 20, 2009, and the image on the right was taken on Aug.16, 2009.
 The impact and its after-effects can be seen as the bright spot on the lower left of the
 July 20 image and as the bright smudge on the lower left of the Aug.16 




A stunning sight

The stunning icy landscape of northern Canada was photographed from International 
Space Station on Jan. 11. Italian astronaut Paolo Nespoli sent the picture down to 
Earth via his Flickr account (magisstra).




Eyes on the sky

Four antennas of the European Southern Observatory's ALMA array of radio telescopes 
in Chile gaze up at the star-filled night sky in anticipation of the work that lies ahead. 
The moon lights the scene on the right, while the band of the Milky Way stretches 
across the upper left. This photograph was ESO's "Picture of the Week" for Feb. 21.



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