Surprisingly, Pluto is able to maintain a gravitational grasp on much of its atmosphere even as ions are being stripped away by the solar wind.
It what could soon be called 'Cloudgate,' 'leaked' emails appear to discuss structures in Pluto’s already hazy atmosphere as clouds.
In a decidedly wintry-looking scene, frost-filled fractures fills a crater near the north pole of Mars -- as observed by NASA's Mars Reconnaissance Orbiter.
It's not in a galaxy far, far away or even another star system — this alien world is right in our planetary backyard, a mere 900 million miles away in orbit around Saturn.
A Japanese spacecraft, which failed to make it into Venus orbit in 2010, is making a return trip to the planet after being stuck in solar orbit and engineers are hopeful it will complete its mission.
Europe's XMM-Newton telescope took an X-ray scan of the Milky Way's core, capturing some dazzling high-energy delights.
In TWO stunning orbital photos, a thunderstorm over Mexico generated two huge, red sprites reaching into space.Ω
On Sunday, May 31, 2015, NASA's Cassini spacecraft successfully made its latest and final flyby of Hyperion, Saturn's spongy moon. And the view was amazing.
You're not seeing double; these are two images of the same world: icy, cratered Rhea, the second-largest natural satellite of Saturn.
Already running on fumes as its fuel reserves dwindled, Venus Express' most recent attempts at maintaining its altitude fell short.
The European spacecraft has completed a risky aerobreaking maneuver in Venus' atmosphere, allowing critical data of the planet's atmosphere to be taken.