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May 11, 2013 NASA sent two astronauts on a spacewalk Saturday to fix an ammonia leak in one of International Space Station's power systems.

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May 9, 2013 Google teamed up with the USGS, NASA and TIME magazine to release a stunning cache of satellite images compiled over the past 28 years.

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April 24, 2013 Mesmerizing. Dazzling. Gorgeous. Pick your word. NASA's collection of images taken of the sun over the course of three years is getting rave reviews.

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April 21, 2013 The Antares rocket launch is back on Sunday afternoon, as engineers and spectators look for the rocket to lift off from a launch pad at NASA's Wallops Flight Facility. The mission had been postponed twice this week, due to high winds in one case and a loose cable in another.

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April 2, 2013 But the man who issued one of the earliest warnings about the potential for global warming isn't going away. He plans to concentrate on his environmental activism efforts.

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March 21, 2013 Results from the European Planck satellite point to an older and slower universe. Commentator Marcelo Gleiser says the data gives us confidence that cosmology is on the right track to explain the Universe in which we live.

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March 20, 2013 Some of the most powerful U.S. rocket engines ever built have been raised from the depths off Florida. The Apollo-era motors are to be restored and put on display. Meanwhile, NASA has pulled unused copies of the same engine out of storage and fired them up as part of its program to build new heavy lift rockets.

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March 15, 2013 The comet's now putting on a show in the Northern Hemisphere's night sky. Using its orbiting observatories, NASA captured a stereo view from space that offers a unique perspective.

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March 3, 2013 Mechanical difficulties after Friday's launch pushed back the capture of the unmanned capsule by a day. The Dragon will stay in place until the end of March, after dropping off 1,200 pounds of supplies, and return with more than twice that amount.

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February 20, 2013 Satellites help track storms, power the GPS signals in our cars and phones and beam TV signals around the world. But they also send back striking, totally disarming images of planet Earth.

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January 15, 2013 Pollution around Beijing has been stifling for the past few days. NASA has released a pair of satellite images, showing the extent of the smog from space and how the air has changed in the past couple weeks.

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January 15, 2013 In a breathtaking video, astronauts talk of the Overview Effect: how their vision of the Earth — and our role in its future — changed once they saw it from space. It's high time we take their views seriously and act as a species to preserve our future.

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December 19, 2012 According to millions of people, the world will end this Friday. Commentator Marcelo Gleiser debunks the doomsday prophecy and reflects on why so many otherwise reasonable people fall prey to such ancient fears.

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December 18, 2012 Sub-surface water oceans and surface seas of liquid methane. The solar system just outside our doorstep is rich with possibilities. It's a voyage that astronaut-sailors will, one day, embark upon.

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November 22, 2012 Candied yams with a touch of marshmallow cream are what the astronauts on the International Space Station are looking forward to eating for their Thanksgiving feast today. That and a little irradiated smoked turkey, courtesy of NASA.

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