Environment As NASA’s Kepler Mission Comes to an End, Planetary Research Moves Forward The Kepler telescope has run out of fuel and officially entered retirement. Luckily, there is a replacement on the way to continue our observation of the stars. Jason Steffen
Environment We Can Now Detect Earthquakes From Space—and Maybe Venusquakes Too Quakes may offer scientific clues about planets' interiors. Francie Diep
Environment Nuclear Renaissance in Space As the U.S. prepares to relaunch domestic production of plutonium-238, the space community wishes to assure the public of its safety. Are they right? Wendee Holtcamp
Environment Gas on Mars Silent But Not Deadly Scientists weigh the possibility that methane gas on Mars comes from microorganisms in the soil. Matt Palmquist
Environment The Search for Intelligent Light Planet hunter Geoff Marcy scans the skies for answers to the universal question of other life. Frank Kosa