14 June 2011, 08:00 AM ET
What if dinosaurs had not gone extinct? What if Earth was twice as large? How 10 key moments in history could change the present.
09 June 2011, 11:37 AM ET
Saturn forms two night sky triangles this month, one with stars and the other with the moon.
08 June 2011, 03:24 PM ET
June's first quarter moon tonight is the best time for skywatchers to gaze at the moon this month.
07 June 2011, 12:33 PM ET
The first comprehensive set of maps of the slopes and craters on the lunar surface is showing a whole new moon.
06 June 2011, 07:29 AM ET
The Moon is constantly being resurfaced, creating many terrain-types, great diversity among craters and making places where water ice hides; awaiting a generation of moon-miners to turn it into commercially viable life support and rocket fuel
03 June 2011, 03:37 PM ET
NASA?s 2011 Lunabotics competition saw 46 robots from around the world fighting to prove their worth by collect the most simulated moon rocks.
03 June 2011, 02:56 PM ET
The lander test went as planned, but a grass fire was sparked by concrete kicked up from the launch pad.
03 June 2011, 02:51 PM ET
See photos of NASA's Project Morpheus, a robot lander to test space exploration tech.
02 June 2011, 05:35 PM ET
An asteroid the size of a small motorhome zoomed near Earth last night (June 1), coming closer to us than the moon sits.
01 June 2011, 10:35 AM ET
There are a great many wonders to see in the night sky. A telescope is your magic carpet, your time machine and much more.
01 June 2011, 10:22 AM ET
Skywatching events in June 2011, including eclipses of the sun and moon.
27 May 2011, 03:01 PM ET
Two solar eclipses and one lunar eclipse will occur in June and July.
26 May 2011, 02:00 PM ET
Scientists may have to rethink some of their ideas about how the moon formed.
25 May 2011, 01:57 AM ET
Fifty years ago, President John F. Kennedy challenged Congress and the nation to land a man on the moon in before the decade closed. Read the text of his speech.
25 May 2011, 12:00 AM ET
John F. Kennedy's famous speech of May 25, 1961 laid the foundation for humanity to set foot on the moon and fundamentally changed NASA.
20 May 2011, 11:58 AM ET
The 1902 science fiction film classic "A Trip to the Moon" is seeing new life at Cannes Film Festival.
13 May 2011, 10:29 AM ET
Saturn, the moon and a bright star team up for a night sky triangle this weekend.
12 May 2011, 02:01 PM ET
A global "ocean" of molten rock sloshes beneath the surface of Jupiter's moon Io, feeding the fiery satellite's prolific volcanism.
10 May 2011, 11:47 AM ET
A squat, insect–like contraption is set to fly untethered for the first time soon in a NASA test flight.
10 May 2011, 09:47 AM ET
The total lunar eclipse of December 21, 2010, is visible from the site of ESO's Very Large Telescope (VLT) at Cerro Paranal in Chile.
09 May 2011, 02:35 PM ET
During this month of May, four bright planets will engage in a fascinating dance with each other in the morning sky.
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.
09 May 2011, 08:49 AM ET
Next stop, somewhere beyond Earth's orbit.
08 May 2011, 01:00 PM ET
An untold number of cosmic impacts could have created the mysteriously thick atmosphere on Titan.
04 May 2011, 04:10 PM ET
In late May and early June, the Moon will appear to dance from day to day with Jupiter, Mercury and Venus. This animation looks East at 5:00am from the U.S. East Coast. Viewers with telescopes can also spot Uranus, Neptune and Ceres in this ballet.
04 May 2011, 08:59 AM ET
Here are a few basic questions and answers about astronaut Alan Shepard's historic spaceflight of May 5, 1961.
03 May 2011, 01:16 PM ET
This autumn, an asteroid the size of an aircraft carrier will zoom closer to Earth than our own moon, causing scientists to hold their breath.
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.
02 May 2011, 07:25 AM ET
When the Apollo 12 crew returned pieces of a moon probe to Earth, scientists found microbes from Earth inside.
28 April 2011, 02:46 PM ET
Skywatching tips for how you can view six planets aligned above the rising sun.
28 April 2011, 08:00 AM ET
Space tourism has already reached low-Earth orbit, and now the industry is shooting for the moon.
19 April 2011, 12:48 PM ET
The Space Exploration Vehicle will provide astronauts a pressurized shirtsleeve environment as well as hatch attached space suits to explore the moons surface. NASA's Desert Research and Technology Studies (D-Rats) team are testing the vehicle.
15 April 2011, 01:31 PM ET
Skywatchers can observe the first full moon of the spring season in the Northern Hemisphere Sunday (April 17).
06 April 2011, 12:56 PM ET
The global image should aid lunar research and exploration for years to come, scientists say.
06 April 2011, 10:40 AM ET
SpaceX's Falcon Heavy rocket under development could enable new missions beyond low-Earth orbit to destinations in the solar system.
06 April 2011, 07:26 AM ET
Over the next few days, the moon will move past two of the prettiest star clusters in the sky.