09 March 2011, 06:33 PM ET
Astronomers have spotted an ancient galaxy cluster that appears surprisingly young. The galaxy cluster formed nearly 3 billion years after the birth of the universe, but is surprisingly mature, scientists say.
08 March 2011, 03:48 PM ET
Astrophysicist Stephen Hawking and Apollo 11 moonwalker Buzz Aldrin have teamed up to advance humanity's future beyond Earth. Hawking and Aldrin hope to support future exploration.
03 March 2011, 02:01 PM ET
A longstanding question in astronomy is what creates cosmic rays, the super-speedy space particles that can zip right through the Earth.
02 March 2011, 07:58 AM ET
The dusty galaxy NGC 247 is 1 million light-years closer to Earth than once thought.
02 March 2011, 07:12 AM ET
The giant black hole at the heart of galaxy Markarian 231 kicks up a flood of material — behavior that starves the black hole and limits star formation.
28 February 2011, 01:45 PM ET
Findings from NASA's Kepler telescope suggest planets are a dime a dozen in our galaxy.
25 February 2011, 06:00 AM ET
NASA's WISE space telescope took its last photo of the sky on Feb. 1, 2011.
23 February 2011, 05:46 PM ET
The ultradense core of an exploded star contains superfluids, a strange form of superconducting matter.
23 February 2011, 01:09 PM ET
One glance at the night sky shows that some stars are brighter than others. But how bright are they really?
17 February 2011, 09:01 AM ET
A stunning new photo from the Hubble Space Telescope shows newborn stars studding a spiral galaxy like bright blue jewels.
17 February 2011, 07:00 AM ET
Astronomical detectives have assembled a stellar lineup, identifying nearby stars that may come close enough to disrupt our solar system in the next billion years or so.
16 February 2011, 05:54 PM ET
A new study finds that galaxies need the dark matter equivalent of 300 billion suns for star formations.
16 February 2011, 03:15 PM ET
An exquisite, shimmering nebula draped in a veil of interstellar dust is the focus of an image from the European Southern Observatory.
10 February 2011, 04:42 PM ET
Have you ever wondered why most star patterns are associated with specific seasons of the year? Here's why.
10 February 2011, 09:03 AM ET
The first stars in the universe may have been huge, but they weren't the loners astronomers thought.
09 February 2011, 05:51 PM ET
A stunning Valentine's Day photo from space shows a cosmic ring made of black holes and young stars.
09 February 2011, 01:58 PM ET
A new study that suggests the first stars in universe formed in groups, rather than alone, has also revealed a surprising side effect: If conditions were just right, a few of the earliest stars may still be visible today.
07 February 2011, 10:10 AM ET
A supergiant star nearing its death is surrounded by a thick disk of gas and dust that is generally only found around baby stars, as revealed by a new 3D imaging technique.
03 February 2011, 11:40 AM ET
NASA's Kepler mission has discovered its first Earth-size planet candidates and its first candidates in the "habitable zone," the region where liquid water could exist on a planet's surface. One star dubbed Kepler-11 may have as many as 6.
02 February 2011, 06:37 PM ET
An intimate portrait of the newly discovered Kepler-11 planetary system – the most tightly packed planetary system orbiting a single star yet discovered outside of our solar system.
02 February 2011, 01:30 PM ET
A bright galaxy, called NGC 3621, appears to be a good example of a classical spiral galaxy, but astronomers have found that it is actually rather unusual: it does not have a central bulge, and is therefore described as a pure-disk galaxy.
02 February 2011, 01:01 PM ET
Astronomers have discovered an alien solar system containing six planets — including a sunlike star — with five of the newfound worlds orbiting in a close-knit configuration.
02 February 2011, 09:00 AM ET
The Milky Way to the east of the constellation Orion is filled with deep sky gems.
31 January 2011, 03:44 PM ET
NASA's next-generation space telescope could confirm the existence of the oldest galaxy yet seen and peer back even further in time.
28 January 2011, 01:30 PM ET
The constellations of Orion and Taurus point the way to two shining star clusters.
26 January 2011, 01:01 PM ET
Astronomers have peered back in time further than ever before, spotting a galaxy that formed less than 500 million years after birth creation of our universe.
25 January 2011, 05:11 PM ET
A huge star has been photographed slamming through a barrier of cosmic dust.
21 January 2011, 06:18 PM ET
Next Wednesday (Jan. 26), NASA is expected to announce a major discovery made by researchers using the Hubble Space Telescope.
19 January 2011, 02:20 PM ET
A scorching-hot alien planet may be causing its parent star to inflate and deflate like a balloon.
19 January 2011, 02:09 PM ET
Key new clues in the mystery behind what feeds the monstrous supermassive black holes have come to light.
14 January 2011, 05:01 PM ET
The two cousin galaxies couldn't look more different from one another.
14 January 2011, 07:23 AM ET
Scientists have released the largest digital color image of the sky ever made, and it's free to whoever wants to take a look.
13 January 2011, 01:08 PM ET
A dwarf galaxy that is too dim to see but is thought to orbit the Milky Way could soon be found using a new mathematical technique that analyzes ripples in the distribution of gas in spiral galaxies.
13 January 2011, 12:04 PM ET
Researchers have mapped out the dark matter in a sample of huge galaxies.
12 January 2011, 07:08 PM ET
Astronomers have now measured the most massive black hole known from our cosmic neighborhood, a huge beast with a mass of 6.6 billion suns, a new study reports.
12 January 2011, 04:45 PM ET
An advanced camera on a South American telescope will search for clues to why the universe's expansion is speeding up.