Twenty years ago this month, astronauts on the space shuttle Discovery used the spacecraft's robotic arm to launch the Upper Atmosphere Research Satellite into orbit around the Earth.
Published Sep 24, 2011
Hydroxyl radicals are critical for offsetting concentrations of methane in the air.
Published Dec 8, 2018
Sixteen operating satellites monitor Earth. Four more are scheduled to launch in 2014.
Published Jul 5, 2013
Some of the most breathtaking views of Earth taken from space are those that capture our planet’s limb.
Published Apr 2, 2003
Orbiting the Earth at nearly 17,000 miles per hour, NASA's Ice, Cloud and land Elevation Satellite (ICESat) is collecting spectacular new three-dimensional measurements of the Earth's surface and atmosphere.
Published Dec 10, 2003
J brings us joy when we view it from space.
Published Dec 23, 2015
The OMPS instrument on the new Suomi-NPP satellite takes its first measurements.
Published Feb 25, 2012
Atmospheric gases scatter blue wavelengths of visible light more than other wavelengths, giving the Earth’s visible edge a blue halo. At higher and higher altitudes, the atmosphere becomes so thin that it essentially ceases to exist. Gradually, the atmospheric halo fades into the blackness of space. This astronaut photograph captured on July 20, 2006, shows a nearly translucent moon emerging from behind the halo.
Published Feb 2, 2007
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