space

The Two-Way
5:31 am
Tue December 24, 2013

Repairs Done, Astronauts Wrap Up Spacewalk

Astronaut Mike Hopkins during Saturday's spacewalk. He's going out again Tuesday.
NASA.gov

Originally published on Tue December 24, 2013 3:12 pm

Spacewalking astronauts have successfully replaced a failed coolant pump on the International Space Station.

NPR's Joe Palca reports that American spacewalkers Michael Hopkins and Rick Mastracchio had to bolt the massive pump in place (on the ground, it weighs 780 pounds), connect four ammonia lines and plug in five electrical cables. The ammonia is a refrigerant used in the station's two-part cooling system, which is necessary to dissipate heat from the onboard electrical equipment.

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The Two-Way
11:51 am
Mon November 11, 2013

'Ferrari Of Space' Crashes And Burns In Earth's Atmosphere

An artist's rendition of the GOCE satellite shows the craft in its orbit around Earth. After four years of studying oceans and gravity fields, GOCE re-entered the atmosphere over the Southern Atlantic Ocean Sunday night.
ESA /AOES Medialab

Originally published on Mon November 11, 2013 2:41 pm

More than a ton of advanced electronics, including an ion engine and sensors that help detect variations in gravity, crashed into Earth's atmosphere Sunday night, when the European GOCE satellite ended its four-year mission. Most of the 2,425-pound craft disintegrated when it re-entered the atmosphere over the South Atlantic Ocean; about 25 percent did not.

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The Two-Way
10:33 am
Thu August 29, 2013

Are We Martians? Scientist Says We Just Might Be

Mars: Our "home" planet?
NASA Getty Images

Originally published on Thu August 29, 2013 10:15 am

As Adam Frank has said over on the 13.7 blog, "Earth and Mars have been swapping spit (astrobiologically speaking) for eons ... [and] it is entirely possible we were Earth's first alien invasion."

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The Two-Way
8:45 am
Sat May 11, 2013

Astronauts Go On Spacewalk To Fix Ammonia Leak

NASA.gov

Originally published on Sat May 11, 2013 4:11 pm

Two astronauts went on a last-minute spacewalk Saturday to replace a pump suspected of being the source of a serious ammonia leak.

It was unclear what caused the ammonia leak, NASA spokesman Rob Navias said, "but the installation of this spare pump package — at least at the moment — seems to have done the trick."

NASA officials called the spacewalk a success, but said it would take time to see if the leak was indeed stopped. Engineers will review photos the astronauts took at the site.

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