21 April 2013, 07:34 AM ET
The new Antares rocket will launch at 5 p.m. ET (2100 GMT) from NASA's Wallops Flight Facility on Virginia's Eastern Shore.
21 April 2013, 06:10 AM ET
The annual Lyrid shower will peak in the late night hours of Sunday (April 21) and early Monday (April 22).
20 April 2013, 04:45 PM ET
Orbital Sciences will try to launch its Antares rocket again Sunday.
20 April 2013, 08:43 AM ET
Orbital Sciences will launch its Antares rocket test flight today at 6:10 p.m. EDT.
20 April 2013, 07:00 AM ET
Astronomers will webcast live views of Saturn's auroras from Hawaii's Keck Observatory on Sunday, April 21.
19 April 2013, 05:27 PM ET
See what to expect for the 2013 Lyrid meteor shower.
19 April 2013, 03:37 PM ET
Thank you the reader, for your dedication and support. We're so excited to be an Official Honoree in the 2013 Webbys.
19 April 2013, 03:07 PM ET
Pavel Vinogradov became the oldest person to venture into the vacuum of space.
19 April 2013, 02:54 PM ET
Antares' first attempt on Wednesday was scuttled by a glitch. Liftoff is set for Saturday at 5 p.m. ET.
19 April 2013, 02:03 PM ET
The comet that is set for a Thanksgiving encounter with the Sun, may just give Earth more than spectacular '3rd' row view. In January 2014, the third planet from the Sun will cross through a stream of debris left behind by the comet.
19 April 2013, 01:50 PM ET
Artist Thierry Cohen imagines what the night skies of the world's largest cities could be like sans light pollution.
19 April 2013, 01:20 PM ET
You can't see any footprints, but it's still neat to observe the six Apollo landing sites through a telescope.
19 April 2013, 01:02 PM ET
Teams will compete to tackle challenges during the 48-hour event
19 April 2013, 01:00 PM ET
Canadian astronaut Chris Hadfield shares some vital tips to life in space in this video guide.
19 April 2013, 11:27 AM ET
The telescope's image shows the famous Horsehead Nebula in a whole new light.
19 April 2013, 11:23 AM ET
Expedition 35 flight engineers Pavel Vinogradov and Roman Romanenko worked outside the International Space Station on April 19, 2013.
19 April 2013, 09:26 AM ET
Two Russian cosmonauts began a six-hour spacewalk to upgrade the orbiting lab with new experiments.
19 April 2013, 09:25 AM ET
In celebration of the Hubble Space Telescope's 23rd year in orbit, astronomers captured an infrared image of the famous collapsing interstellar cloud. Located in the Orion constellation, it is one of the most recognizable objects in the night sky.
19 April 2013, 06:50 AM ET
Russia's new Bion-M spacecraft will send small animals and microorganisms into space for research.
19 April 2013, 06:30 AM ET
It's time to get the ball rolling toward studying exoplanet atmospheres.
19 April 2013, 06:00 AM ET
Mice, gerbils, lizards and snails are part of the cosmic menagerie that is Russia's Bion-M1 mission.
19 April 2013, 05:45 AM ET
The Mars rover Curiosity, also known as the Mars Science Laboratory, will launch in late 2011 and land on the Red Planet in August 2012.
18 April 2013, 05:43 PM ET
If Kepler-62e and f are covered by global oceans, they may host a variety of aquatic lifeforms.
18 April 2013, 05:41 PM ET
The site also snagged the honor in 2010.
18 April 2013, 05:40 PM ET
Here are six cool things your body does while living in microgravity.