06 April 2014, 08:22 AM ET
New measurements by NASA's Hubble Space Telescope suggest that the cluster nicknamed "El Gordo" (Spanish for "the fat one") contains about as much mass as 3 quadrillion suns. That's 43 percent larger than previous work had estimated.
03 April 2014, 12:17 AM ET
This space wallpaper is a collage of galaxies in the Herschel Reference Survey at infrared/submillimetre wavelengths by Herschel (left) and at visible wavelengths from the Sloan Digital Sky Survey (SDSS, right).
02 April 2014, 12:20 AM ET
This space wallpaper is an artist's concept depicting NASA's Voyager 1 spacecraft entering interstellar space, or the space between stars.
01 April 2014, 02:18 AM ET
Astronomers say there are 100 billion to 200 billion galaxies in the universe. But accurately counting the number of galaxies depends on several factors.
01 April 2014, 12:41 AM ET
This colorful space wallpaper is a radar composite image shows changes in large-scale agricultural plots in southwest Iran. The image was released March 28, 2014.
31 March 2014, 03:20 PM ET
The constellations of Ursa Major (the ‘Big Dipper') and Leo hold a bevy of skywatching goodness this month. Find out how to see the 'Leo Tripet’ of galaxies, plus the double star systems of Mizor and Alcor, and more.
28 March 2014, 02:34 PM ET
HR 5171, the brightest star just below the center of this stunning space wallpaper, is a yellow hypergiant, a very rare type of stars with only a dozen known in our galaxy.
28 March 2014, 11:45 AM ET
The central black holes in dwarf galaxies — the "seeds" that grow into the monsters at the core of the Milky Way and other large galaxies — are probably surprisingly weighty, containing 1,000 to 10,000 times the mass of our sun, a new study reports.
27 March 2014, 09:56 AM ET
This stunning space wallpaper is an artist's illustration showing what the rings surrounding the asteroid Chariklo may look like from a distance.
26 March 2014, 07:20 PM ET
This space wallpaper is an orbit diagram for the outer solar system. The sun and terrestrial planets are at the center. The orbits of the four giant planet Jupiter, Saturn, Uranus and Neptune are shown by purple solid circles.
25 March 2014, 05:01 PM ET
A distant spiral galaxy is leaving behind much of its gas as it shoves its way through its parent galactic cluster. The result will be fatal, as the galaxy will lose most of the fuel it requires for star formation.
25 March 2014, 02:46 PM ET
This 360-degree mosaic panorama of the Milky Way was taken over ten years by the Spitzer Space Telescope.
25 March 2014, 02:27 PM ET
Sandstone layers with varying resistance to erosion are evident in this space wallpaper recorded by the Mast Camera on NASA's Curiosity Mars rover on Feb. 25, 2014, about one-quarter mile (about 400 meters) from a planned waypoint called "the Kimberley."
25 March 2014, 02:25 PM ET
After 10 years capturing 2 million infrared snapshots of our galaxy using the Spitzer Space Telescope, NASA has created a 360-degree panoramic view of our galaxy, showing stars from across the 100,000 light years of the milky way.
24 March 2014, 12:56 PM ET
Two pairs of Saturn’s moons make a rare joint appearance in this amazing space wallpaper.
21 March 2014, 11:22 AM ET
This stunning space wallpaper is a color composite of the unusual polar ring galaxy NGC 4650A. The image was created from data from the new MUSE instrument on ESO’s Very Large Telescope.
21 March 2014, 09:43 AM ET
A new innovative instrument called MUSE (Multi Unit Spectroscopic Explorer) has been successfully installed on ESO's Very Large Telescope (VLT) at the Paranal Observatory in northern Chile. See the amazing photos here.
20 March 2014, 02:20 PM ET
To celebrate its 24th year in orbit, the NASA/ESA Hubble Space Telescope has released this beautiful space wallpaper of part of NGC 2174, also known as the Monkey Head Nebula.
20 March 2014, 06:00 AM ET
The weather did not cooperate for night owls hoping to see a rare celestial sight in the wee hours of Thursday morning (March 20). Skywatchers stayed up late hoping to see the huge asteroid 163 Erigone pass in front of the bright star Regulus.
19 March 2014, 06:36 PM ET
This spectacular space wallpaper is a mosaic from NASA's Lunar Reconnaissance Orbiter showcasing the north pole in high resolution. The images run from 60 to 90 degrees north latitude, with a resolution of 6.5 feet (2 meters) per pixel.
19 March 2014, 04:31 PM ET
Get a little tipsy at your favorite bar while checking out a very rare cosmic treat happening above New York City tonight: An asteroid the size of Rhode Island will pass in front of one of the brightest stars in the night sky during the wee hours.
19 March 2014, 01:03 AM ET
An asteroid the size of Rhode Island will briefly blot out one of the brightest stars in the sky overnight tonight (March 19-20), and you can watch the rare celestial event live online. Here's how.
18 March 2014, 02:12 PM ET
The Dark Sector Lab (DSL), located 3/4 of a mile from the Geographic South Pole, houses the BICEP2 telescope (left) and the South Pole Telescope (right).
18 March 2014, 11:35 AM ET
The night sky can be a wondrous place filled with stars, but there are some brilliant celestial lights that shine brighter than others. Here's a list of the top 10 brightest stars in the night sky.
17 March 2014, 03:13 PM ET
The sun sets behind BICEP2 (in the foreground) and the South Pole Telescope (in the background) in this stunning space wallpaper.
13 March 2014, 05:14 PM ET
This amazing space wallpaper shows an ultra-bright young galaxy known as GN-z10-3, discovered in the Hubble GOODS North field (Great Observatories Origins Deep Survey).
13 March 2014, 07:46 AM ET
Hundreds of “rogue” wandering black holes may dwell in the Milky Way – and now Harvard University researchers say they know how to detect them. The discovery of these strange objects could shed light on the formation of the Milky Way and other galaxies.
12 March 2014, 01:48 PM ET
This space wallpaper is an artist’s impression showing the yellow hypergiant star HR 5171. This is a very rare type of star with only a dozen known in our galaxy. Its size is over 1300 times that of our Sun — one of the largest ten stars found so far.
11 March 2014, 04:08 PM ET
A nearly full Rhea shines in the sunlight in this stunning space wallpaper taken in visible light with the Cassini spacecraft’s narrow-angle camera on Sept. 10, 2013. Rhea (949 miles, or 1,527 kilometers across) is Saturn's second largest moon.
10 March 2014, 11:33 AM ET
Only 12 million years old, or less than three-thousandths of the age of the Sun, Beta Pictoris, as seen in this space wallpaper, is 75 percent more massive than our parent star.
07 March 2014, 01:00 PM ET
This space wallpaper from the Hubble Space Telescope shows the rare sight of the asteroid P/2013 R3 breaking apart. This image, the first in a series, was taken on Oct. 29, 2013.
06 March 2014, 12:42 PM ET
As spiral galaxy ESO 137-001 zooms through the super hot gas of the Norma cluster, much of it's own gas is pulled away in a process called 'ram pressure stripping. The threads of gas left behind give birth to bright young stars, seen here in blue.
06 March 2014, 11:07 AM ET
The spiral galaxy ESO 137-001 looks like a dandelion caught in a breeze in this stunning space wallpaper from Hubble Space Telescope.
05 March 2014, 03:20 PM ET
Astronomers have calculated how fast a distant supermassive black hole rotates, clocking it at nearly half the speed of light. A fortuitious lineup of cosmic objects allowed scientists to measure the mind-boggling spin rate.
05 March 2014, 12:26 PM ET
Spinning 390 times a second, the "black widow" pulsar PSR J1311−3430 periodically swings its radio (green) and gamma-ray (magenta) beams past Earth in this amazing space wallpaper.
04 March 2014, 02:36 PM ET
This space wallpaper is an illustration depicting the amount of space junk currently orbiting Earth.