19 May 2011, 01:45 PM ET
A new study could confirm that the mysterious forces of dark energy are pulling the universe apart at ever-increasing speeds.
16 May 2011, 02:12 PM ET
Raging galactic windstorms have been observed by the Herschel infrared space observatory.
13 May 2011, 12:56 PM ET
A starry constellation of two hunting dogs is now visible in the nighttime sky.
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, 09:39 AM ET
A new image from the Hubble Space Telescope reveals a dwarf galaxy packed with young stars and gas clouds.
11 May 2011, 01:00 PM ET
Among the more than 500 known alien planets, many are oddballs.
11 May 2011, 08:31 AM ET
A pair of white dwarf stars orbiting each other once every 39 minutes will eventually collide in a few million years, creating a newborn stars as seen in this animation.
11 May 2011, 07:00 AM ET
Astronomers discovered two stars that are set to collide and produce a new star.
10 May 2011, 01:43 PM ET
The Herschel Space Observatory has detected massive gas storms emanating from galaxies that have the ability to stunt star growth and end galaxy formation.
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.
05 May 2011, 06:49 PM ET
A star, telescope and a spinning sphere are all that are necessary but the precise technologies needed to make this orbiting time-space experiment reality took 4 decades to develop.
04 May 2011, 05:05 PM ET
The long pattern of Hydra is visible now.
04 May 2011, 01:13 PM ET
Take a trip from Centaurus to the lopsided spiral arms of the NGC 2442 galaxy, nicknamed Meathook.
04 May 2011, 06:01 AM ET
The asymmetrical Meathook galaxy is featured in contrasting views from two telescopes.
27 April 2011, 03:55 PM ET
Two close spiral galaxies are exerting their distorting gravitational influence on each other.
27 April 2011, 01:01 PM ET
The first stars may have spun at more than 1 million mph, scientists say.
27 April 2011, 10:11 AM ET
New evidence for what may have caused an historic supernova explosion has been found by NASA's Chandra X-ray Observatory.
22 April 2011, 06:00 AM ET
The bright yellow star Arcturus is putting on a dazzling show in the night sky.
21 April 2011, 04:00 PM ET
A spiral galaxy is being distorted by the gravitational pull of a neighbor in a new photo from the Hubble Space Telescope.
20 April 2011, 11:18 AM ET
A spectacular time-lapse video of the landscapes and skyscapes of El Teide, a huge volcanic peak in the Canary Islands.
18 April 2011, 07:03 PM ET
Luke Skywalker's home planet of Tatooine is a vividly realized alien world, but it may be missing one key detail: black plants.
18 April 2011, 12:36 PM ET
The famed supernova Cassiopeia A may have been visible in 1630, five decades earlier than thought.
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).
15 April 2011, 07:00 AM ET
New images reveal photogenic, but puzzling, tangled cosmic filaments.
14 April 2011, 07:48 AM ET
The first galaxies formed much earlier than previously thought — just 200 million years after the universe's birth.
13 April 2011, 02:57 PM ET
Astronomers today are lucky, with a plethora of evidence from the Big Bang readily available.
08 April 2011, 01:19 PM ET
Astronomer Joe Rao recounts an amazing trip to the Southern Hemisphere to view a whole new sky.
07 April 2011, 02:03 PM ET
NASA's planet-hunting Kepler space observatory is showing it's a multi-purpose instrument.
05 April 2011, 08:07 PM ET
Astronomers discovered a time delay between two jets of gas from a young star.
01 April 2011, 06:46 PM ET
Now is a good time to see the Big Dipper stars and constellation Ursa Major.
31 March 2011, 10:32 AM ET
Sub-brown dwarfs – a mid-point between planets and stars – could prove fertile grounds for extraterrestrial life.
30 March 2011, 03:54 PM ET
Saturn is back in the evening sky and here's how to see it.
30 March 2011, 01:01 PM ET
Astronomers have taken the pulse of red giant stars using starquakes.
30 March 2011, 07:00 AM ET
The star cluster NGC 371 glows pink and red in a new photo from ESO's Very Large Telescope.
29 March 2011, 04:52 PM ET
Spring is here, and with it a seasonal star formation is front and center in the night sky.