15 May 2015, 12:45 PM ET
The neutron star SGR 1745-2900 near the Milky Way's supermassive black hole Sagittarius A* is not slowing down its X-ray output as expected. Data from Chandra's X-ray Observatory show a slow decline in X-ray brightness and high temperature surfaces.
15 May 2015, 10:50 AM ET
The Hubble Space Telescope was used to study 3000 white dwarf stars in Milky Way star cluster 47 Tucanae. The white dwarfs are migrating outward from the center of the cluster, which is home to hundreds of thousands of stars.
15 May 2015, 10:30 AM ET
The House Science Committee approved four bills on commercial space topics during a lengthy markup session May 13 marked by partisan divides on a number of issues.
15 May 2015, 07:00 AM ET
NASA's New Horizons probe, which is set to perform the first-ever flyby of Pluto on July 14, has begun hunting for possible rings and undiscovered moons, in an effort to identify potential hazards near the dwarf planet.
14 May 2015, 11:00 PM ET
As New Horizons nears its closest approach with Pluto, the mission team is hosting 'Pluto-Palooza' events in multiple locations around the country.
14 May 2015, 07:49 PM ET
NASA's Kepler mission captured over 2 months of Triton's orbit of Neptune. Small moon Nereid joins in on the dance on Day 24 and some streaking asteroids make the flurry complete.
14 May 2015, 04:24 PM ET
A giant nebula in the early universe hits the jackpot when it comes to rare, bright objects known as quasars, boasting four within surprisingly close proximity to one another. The first known quasar quartet lies in a cloud of cool gas that could provide a
14 May 2015, 01:54 PM ET
A dense cloud of gas that astronomers are calling a 'cosmic dinosaur egg' appears to be on the cusp of birthing millions of stars. This may be the youngest example of an object called a globular cluster.
14 May 2015, 12:47 PM ET
See amazing images of the night sky and cosmos in SPACE.com's gallery of cosmic images posted in April 2015.
14 May 2015, 07:18 AM ET
"Chaotic planets" that possess wildly unpredictable orbits and climates likely circle distant stars, suggesting that some alien worlds that look habitable might actually be hostile to life for millions of years at a time, a new study reports.
14 May 2015, 07:00 AM ET
As dark matter circles around a black hole, it might create a gamma-ray signal that could be detectable from Earth. A visible signal from the otherwise-invisible stuff would be a major breakthrough in the study of this mysterious material.
13 May 2015, 10:33 PM ET
A clue to one of the biggest questions in cosmology — why did regular matter survive to fill the universe, instead of antimatter — may have been found in data from NASA's Fermi Gamma-ray Space Telescope.
13 May 2015, 05:01 PM ET
A new NASA image, captured by MODIS on the Aqua satellite, reveals clouds cover two-thirds of Earth, with some zones supporting more clouds than others on the planet.
13 May 2015, 04:09 PM ET
Bill Nye (The Science Guy) wants you to be a part — and get a part — of a "revolutionary solar sailing spacecraft." The leader of The Planetary Society has started crowdfunding for LightSail, a citizen-funded flight by light.
13 May 2015, 02:07 PM ET
Astronomers may have solved the decades-long cosmic murder mystery of what kills most galaxies in the universe: They are strangled to death . 'What kills galaxies is one of the most challenging questions in the past 20 years,' a scientist says.
13 May 2015, 11:11 AM ET
Small moons Styx, Nix, Kerberos and Hydra – along with the big moon Charon – ‘pulled up’ out of the noise and star field by processing images from the NASA probe's Long Range Reconnaissance Imager (April 25th-May 2nd, 2015).
13 May 2015, 07:30 AM ET
Do jokes about the name 'Uranus" get in the way of people actually learning about the gas giant planet?
13 May 2015, 07:19 AM ET
The reddish-brown lines that crisscross the icy surface of Europa may be radiation-blasted sea salt from the Jupiter moon's underground ocean. Radiation-blasted salt turned dark during a lab experiment that mimicked Europa conditions.
13 May 2015, 07:00 AM ET
Although DNA and RNA would not function in environments like that of Saturn's moon Titan, ethers could fulfill this key role.
13 May 2015, 07:00 AM ET
Dozens of students from 14 countries around the world came together recently to map out a manned mission to a captured asteroid in lunar orbit — a project very much like one NASA hopes to achieve by 2025.
12 May 2015, 08:08 PM ET
New Horizons took a series of images from April 25 through May 1. The shots mark the first time New Horizons has managed to resolve the extremely faint Pluto moons Kerberos and Styx, mission team members said.
12 May 2015, 03:56 PM ET
The clusters, marked in red in the video, are thought to harbor massive black holes or large amounts of dark matter. Locations of normal globular clusters (blue) and clusters that are similar to dwarf galaxies (green) are also shown.
12 May 2015, 11:06 AM ET
An inflatable drone could cruise the sulfurous skies of Venus next decade if Northrop Gruman can sell NASA on the mission.
12 May 2015, 10:49 AM ET
The Andromeda galaxy — the closest spiral galaxy to the Milky Way — is about six times larger and 1,000 times more massive than previously thought, new observations show.
12 May 2015, 07:30 AM ET
NASA is asking commercial launch providers to develop new systems specifically for "cubesats." These days, such bantam craft must generally piggyback aboard big rockets carrying much larger and more expensive satellites as their primary payloads.
12 May 2015, 07:30 AM ET
A new study suggests that Mars has lost the equivalent of an ocean's worth of water over the past four billion years. However, the question of whether Mars was ever warm enough to have hosted such an ocean has sparked debate.
11 May 2015, 05:05 PM ET
NASA's Dawn spacecraft has obtained the best views yet of the mysterious features, capturing them from a distance of just 8,400 miles (13,600 kilometers) in a series of images that mission team members combined to make a new Ceres video.
11 May 2015, 12:00 PM ET
Curiosity captured the images, which mission team members combined into a Martian sunset video, with its Mast Camera between dust storms on April 15, NASA officials said.
11 May 2015, 11:49 AM ET
The latest set of images of the dwarf planet from NASA's Dawn mission reveal the brights spots to be composed of many small regions "due to the reflection of sunlight" whose composition is still unknown, according to Dawn's principal investigator.
11 May 2015, 10:09 AM ET
On April 15th, 2015, NASA's Mars Science Laboratory ‘Curiosity’ captured 4 frames of imagery of the setting sun. The Mars Exploration Rover ‘Opportunity’ snapped sunsets on Nov 4th and 5th, 2010.
11 May 2015, 07:21 AM ET
For years, tiny payloads have been launched into Earth orbit on satellites smaller than a loaf of bread.
11 May 2015, 07:01 AM ET
Small and economical "cubesats" already eye our planet from orbit. But such bantam craft are about to start pushing out into deep space, helping researchers study and explore the moon, asteroids and other distant bodies.