14 September 2012, 07:30 AM ET
The night sky's autumn constellations follow the summer stars so closely they can be seen well before the air gets chilly.
12 September 2012, 10:34 PM ET
This cool space wallpaper shows the bright, young star left of center gives NGC 1999 its brightness.
12 September 2012, 03:02 PM ET
Photographer John Eklund captured over 260,000 images to create this stunning video of the majestic landscapes in and magnificent skies above the pacific northwest of the United States.
10 September 2012, 07:40 PM ET
The result is a fun offshoot of the online Galaxy Zoo project.
06 September 2012, 09:01 AM ET
An elliptical and a spiral galaxy are pictured together in this new portrait from the Hubble Space Telescope.
06 September 2012, 02:41 AM ET
The galaxy I Zwicky 18, originally thought to be a young galaxy, actually seems to have formed around the same time as most other galaxies in this space wallpaper.
05 September 2012, 12:07 PM ET
Two very different galaxies were captured together by the Hubble Space Telescope: Messier 60, a large, old, and extremely bright elliptical galaxy; and NGC 4647, a young, blue spiral galaxy.
05 September 2012, 06:00 AM ET
A star in the Messier 4 globular cluster appears to hold the secret of eternal youth.
04 September 2012, 03:33 PM ET
Delphinus the dolphin and Cetus the whale are on view now.
04 September 2012, 03:06 PM ET
This striking space wallpaper shows a beautiful yet peculiar pair of galaxies.
04 September 2012, 02:10 PM ET
This new image of Messier 4, one of more than 150 globular star clusters orbiting around our galaxy, was recently captured by the ESO's La Silla Observatory in Chile. The image reveals tens of thousands of ancient stars.
04 September 2012, 11:50 AM ET
This September skywatchers can catch a glimpse of four planets (Venus, Mars, Jupiter, and Saturn) as well as a visual trick in the constellation Capricornus that makes two stars look like one oddly enlongated star.
04 September 2012, 07:00 AM ET
The ripples in space-time predicted by Einstein look to be responsible.
29 August 2012, 01:12 PM ET
The graceful gravitational dance of two colliding galaxies can feed the supermassive black holes at their center, rearranging and heating up the gas within these galaxies as seen in this simulation.
29 August 2012, 11:26 AM ET
Far away from light pollution and high up in the Sierra Nevada mountain range, Yosemite National Park's stunning views of the night sky and majestic natural wonders attract astronomers, photographers and city dwellers from around the country.
29 August 2012, 07:01 AM ET
A number of night sky superlatives are overhead now.
29 August 2012, 06:01 AM ET
Astronomers found molecules of a simple form of sugar, known as glycolaldehyde, around a young star.
28 August 2012, 04:23 PM ET
Most stars come in pairs. NASA's Kepler space telescope has now confirmed a pair of planets orbiting a pair of stars about 5000 light years from Earth. So we see their light from long, long ago; but not so far away (& very much within our own galaxy)
28 August 2012, 09:30 AM ET
The brightest planet and the largest star are just the start of the night's sky's extreme objects.
23 August 2012, 03:38 PM ET
Periodic nova eruptions from a binary star system is a sign of bigger trouble brewing. Red giant stars donate mass to their white dwarf companions until - over a critical mass - the dwarves destroy themselves in Type 1a supernova explosions.
23 August 2012, 01:02 PM ET
The two newfound galaxies are spirals with two large companion galaxies, just like our own Milky Way.
21 August 2012, 01:48 PM ET
Einstein's General Theory of Relativity predicts that in the 'big picture' of the universe, matter is scattered randomly. Australian astronomers conducted the largest ever survey of galaxies on this scale to prove that his theory was correct.
17 August 2012, 02:16 PM ET
This stunning space wallpaper shows the central region of a beautiful spiral galaxy, Messier 83.
16 August 2012, 02:15 PM ET
The clusters are located about 170,000 light-years away.
15 August 2012, 07:55 PM ET
This space wallpaper reveals an artist's impression of galaxy at center of Phoenix Cluster.
15 August 2012, 05:10 PM ET
Some key facts about the faraway cluster, which may be the most massive ever found.
15 August 2012, 01:22 PM ET
See images depicting the Phoenix galaxy cluster that is breaking several important cosmic records.
15 August 2012, 01:00 PM ET
A distant galaxy cluster is smashing records left and right.
14 August 2012, 05:23 PM ET
How do scientists know the shape of the Milky Way when we can only see it from the inside?
14 August 2012, 07:00 AM ET
Scientists discovered a pulsar that is fleeing rapidly from the supernova that birthed it.
10 August 2012, 01:15 PM ET
Dark clouds of dust, called globules, are silhouetted against nearby, bright stars in this space wallpaper. Little is known about the globules, except that they are generally associated with areas of star formation.
09 August 2012, 07:00 AM ET
The map could help crack the mystery of dark energy and dark matter.
08 August 2012, 07:57 PM ET
Nearly 400,000 galaxies are represented in an animation derived from the Sloan Digital Sky Survey (SDSS) data release 7. Miguel Arago and Alex Szalay of John Hopkins University and Mark Subbarao of the Adler Planetarium created this amazing view.
06 August 2012, 07:00 AM ET
A star in the process of being gobbled by a black hole is letting of dying screams.
01 August 2012, 06:01 AM ET
The photo is the most detailed ever taken of the spiral galaxy NGC 1187.
26 July 2012, 02:01 PM ET
The results have implications for how astronomers understand the evolution of galaxies.