16 April 2015, 01:51 PM ET
NASA astronaut John Grunsfeld (now Associate Admin. for the Science Mission Directorate) looks back at how Hubble’s upgradable design can help us create more powerful space-based observatories.
16 April 2015, 07:30 AM ET
A NASA telescope co-discovered one of the most distant planets ever discovered, a gas giant about 13,000 light-years away from Earth.
15 April 2015, 05:55 PM ET
It's now time to start planning out a future space telescope that will tackle the next big frontier in astronomy and astrophysics, researcher Mario Livio says — the search for signs of life beyond our neck of the cosmic woods.
15 April 2015, 11:37 AM ET
The world looks different to Neil deGrasse Tyson because he’s an astrophysicist. When a great communicator gets his hands on an elegant tool, enlightenment (and, yeah, a little ego) ensues. But why did @NeilTyson choose Twitter? He tells Space.com.
13 April 2015, 01:01 PM ET
Liquid water likely lurks just below the surface of Mars on cold winter nights, according to new research. Is it enough to support microscopic life-forms?
12 April 2015, 10:12 AM ET
A total lunar eclipse wowed skywatchers and two private spaceflight companies tackled big challenges. These, and more, are Space.com's picks for the best space stories for the week of April 12.
12 April 2015, 09:34 AM ET
From a cosmic garden to fishing for space junk, don't miss these amazing space images of the week for April 12, 2015.
09 April 2015, 10:40 AM ET
Researchers at NASA's Ames Research Center in California generated three key components of RNA and DNA in the lab, by exposing commonly occurring ring-shaped molecules of carbon and nitrogen to radiation under spacelike conditions.
08 April 2015, 01:01 PM ET
The protoplanetary disc around a constellation of Taurus star, named MWC 480, harbors enough methyl cyanide (CH3CN) to "fill all of Earth’s oceans," according to the European Southern Observatory.
07 April 2015, 04:50 PM ET
Solid signs of alien life will be spotted within 10 years, and definitive evidence will roll in within 20 to 30 years, NASA chief scientist Ellen Stofan said Tuesday (April 7).
07 April 2015, 03:45 PM ET
A telescope will soon allow astronomers to probe the atmosphere of Earthlike exoplanets for signs of life. To prepare, astronomer Lisa Kaltenegger and her team are modeling the atmospheric fingerprints for hundreds of potential alien worlds.
07 April 2015, 08:01 AM ET
When it comes to the search for life beyond Earth, the mantra is always 'follow the water.' But could an environment without H2O give rise to life in a different form? Scientists now say it's theoretically possible.
07 April 2015, 07:01 AM ET
A new study sheds light on how exoplanets in tightly-packed solar systems interact with each other gravitationally by affecting one another's climates and their abilities to support alien life.
06 April 2015, 07:35 AM ET
A new exhibit at the American Museum of Natural History in New York highlights extreme examples of life on Earth, and what they may tell us about life elsewhere in the universe.
05 April 2015, 10:15 AM ET
What were our favorite stories of the week? This week had something for every kind of space fan. Find out our favorite stories of the past seven days below:
04 April 2015, 06:25 PM ET
From strange 'Hollows' on Mercury to eerie green space clouds, don't miss these amazing space images of the week for April 4, 2015.
03 April 2015, 07:00 AM ET
Scientists are still trying to understand what causes Mars' myriad dark streaks, and what these features might mean for the possible existence of Red Planet life.
01 April 2015, 08:00 AM ET
Ancient Mars may have featured oceans with huge, slow-moving waves. Studying the shorelines these waves may have carved could shed light on the ancient Martian climate, such as whether or not it had seas long enough for life to potentially develop.
01 April 2015, 12:00 AM ET
See amazing images of the night sky and cosmos in SPACE.com's gallery of cosmic images posted in March 2015.
31 March 2015, 03:30 PM ET
It is called NIROSETI for near-infrared optical SETI. This new instrument can record levels of light over time so that patterns can be analyzed and assessed for potential signs of other civilizations.
31 March 2015, 07:00 AM ET
Many astronomers had thought rocky, potentially habitable worlds could not take shape in the complex environment around binary stars. But mathematical simulations suggest otherwise, a new study reports.
31 March 2015, 07:00 AM ET
Earlier this month, researchers made two big announcements: Saturn's moon Enceladus likely harbors hot springs, and Jupiter's huge satellite Ganymede apparently possesses a subsurface ocean that may contain more water than all of Earth does.
30 March 2015, 06:40 AM ET
If an alien planet in a distant solar system were home to microscopic life-forms, how might scientists see them and even decipher their identity? A new catalog of Earth-based life forms may provide a first step.
29 March 2015, 09:51 AM ET
Two spaceflyers blasted off on the first-ever yearlong mission to the International Space Station and NASA announced its plan to haul a boulder from a near-Earth asteroid to lunar orbit. Here's a look at Space.com's top stories of the week.
28 March 2015, 01:34 PM ET
From the first (contraband) corned beef sandwich in space to astronomy's oldest known 'Nova,' don't miss these amazing space images of the week for March 29, 2015.
26 March 2015, 11:58 PM ET
The two-year mission of the one-ton rover is to find out if Mars is, or was, capable of supporting life.
24 March 2015, 04:28 PM ET
NASA's Kepler mission team will receive the Smithsonian National Air and Space Museum's 2015 Trophy for Current Achievement. Tom Krimigis of the Johns Hopkins University's Applied Physics Lab, will get the museum's Lifetime Achievement award.
23 March 2015, 03:01 PM ET
Nitrogen was available on ancient Mars in a form that microbes could have used to build key biomolecules, and atmospheric carbon monoxide has been a feasible energy source for life throughout the Red Planet's history, two new studies suggest.
21 March 2015, 07:32 PM ET
The semi-taboo Titus-Bode relation could provide useful hints about the periods of as-yet-undetected planets around other stars.
21 March 2015, 04:00 PM ET
From St. Patrick's day in space to a spectacular solar eclipse, don't miss these amazing space images of the week for March 21, 2015.
19 March 2015, 01:00 PM ET
For years, many astronomers thought planets around red dwarfs were probably uninhabitable. But recently, the thinking has begun to change.
14 March 2015, 12:32 PM ET
From a monster solar flare to a spectacular night launch, don't miss these amazing space images of the week for March 15, 2015.