20 July 2011, 03:33 PM ET
Mercury is reaching its eastern most point in the night sky tonight.
13 July 2011, 12:18 PM ET
As Prometheus tangos past, particles in Saturn's outermost "F-Ring" resonate into long-patterned movements induced by the small moon's gravity. This animation shows glimpses of the effects over a 60+ day period.
06 July 2011, 04:21 PM ET
NASA's Cassini spacecraft sent images and thunderous sounds from a gigantic storm on Saturn which at one point covered approximately 2 billion square miles of the planet.
01 July 2011, 03:06 PM ET
Scientists struggle to launch planetary missions without giving up a robotic arm and a leg.
25 June 2011, 12:28 AM ET
From Pluto to the bowels of the sun, check out the best space photos for the week of June 27, 2011.
22 June 2011, 01:01 PM ET
Geysers exploding from the surface of Saturn's moon, Enceladus, reveal their source is an underground ocean.
21 June 2011, 03:54 PM ET
A NASA spacecraft has captured a stunning new image of a small, icy Saturn moon.
20 June 2011, 07:58 PM ET
It has been five years since Nix and Hydra, Pluto's tiny moons, were named. Mysteries still abound with the pair.
16 June 2011, 10:21 AM ET
An instrument on the Cassini spacecraft at Saturn is offline, most likely due to a short circuit, NASA says.
15 June 2011, 06:00 AM ET
A European space telescope has found 10 new alien planets, including two Neptune-like objects orbiting the same star.
09 June 2011, 11:37 AM ET
Saturn forms two night sky triangles this month, one with stars and the other with the moon.
03 June 2011, 12:03 PM ET
The binary star Porrima is offering a rare chance to resolve its twin stars through a small telescope this month.
02 June 2011, 10:34 AM ET
Future missions to the Saturn moon Titan may look for lightning in a novel way — by searching for its rumbling companion, thunder.
25 May 2011, 07:10 PM ET
NASA will launch the robotic OSIRIS-REx mission in 2016.
25 May 2011, 01:56 PM ET
NASA will unveil a new science mission today (May 25) at 4 p.m. ET.
19 May 2011, 03:18 PM ET
Beginning this month there will be a long series of double shadow transits on Jupiter.
19 May 2011, 02:00 PM ET
A monster storm on Saturn is giving astronomers a rare glimpse into the mechanics of the planet's atmosphere.
13 May 2011, 10:29 AM ET
Saturn, the moon and a bright star team up for a night sky triangle this weekend.
09 May 2011, 08:52 AM ET
The shores of Ontario Lacus lake in the Southern Hemisphere of Saturn's moon Titan has very familiar features, surprising being that it is 800,000,000 miles away and 289° below 0°F.
08 May 2011, 01:00 PM ET
An untold number of cosmic impacts could have created the mysteriously thick atmosphere on Titan.
06 May 2011, 11:45 AM ET
Which mission will win a 2016 launch? Robotic probes to Saturn's moon Titan, Mars and a comet face off.
03 May 2011, 07:30 AM ET
A huge ocean of liquid water may slosh about beneath the frigid surface of Saturn's moon Titan, according to a new study.
29 April 2011, 04:25 PM ET
It may be decades before humanity sets foot on Mars, but we're only five years away from sampling space beyond our solar system for the first time.
29 April 2011, 04:24 PM ET
Amplified hiss-like radio noise generated by electrons that traveled along magnetic field lines from Enceladus to an aurora on Saturn were captured by NASA's Cassini spacecraft.
29 April 2011, 04:24 PM ET
Here are five facts about NASA's twin Voyager 1 and 2 spacecraft, which are set to leave our solar system by 2016 or so.
29 April 2011, 07:06 AM ET
A look at the Voyager mission, which has sent spacecraft to the very edge of the solar system.
20 April 2011, 12:48 PM ET
Saturn's icy moon Enceladus creates aurora glow on its parent planet.
20 April 2011, 06:00 AM ET
The two moons of Mars – Phobos and Deimos – are in the sights of both robotic and human spaceflight planners.
19 April 2011, 07:00 AM ET
Alien planets around certain stars or starless could have lakes like Saturn's moon Titan.
15 April 2011, 02:07 PM ET
The Saturn triangle returns to the night sky Saturday night.
09 April 2011, 08:06 AM ET
Weather and meteor impacts, not ice volcanoes, may actually be reshaping Titan - Saturn's largest moon.
01 April 2011, 05:33 PM ET
Here's a look at how to observe the planets of the solar system in 2011.
31 March 2011, 02:02 PM ET
Ring ripples around Saturn and Jupiter tell a violent story of comet strikes.
30 March 2011, 03:54 PM ET
Saturn is back in the evening sky and here's how to see it.
23 March 2011, 11:33 AM ET
Saturn's odd radio emissions likely show the sun's shifting influence on the giant planet.
23 March 2011, 09:33 AM ET
Hear the strange radio signals from Saturn as heard by Cassini, and how they work.