08 January 2015, 07:05 AM ET
Sierra Nevada Corporation, which is building Dream Chaser, recently checked off a propulsion-system milestone laid out in the company's last commercial-crew contract with NASA, which was signed in 2012.
08 January 2015, 07:00 AM ET
Just a year after opening its eyes, the Gemini Planet Imager has already detected unexpected differences between two sister exoplanets and helped characterize the ring of dust and rocky bodies surrounding a young star.
08 January 2015, 07:00 AM ET
A new exhibit at the Smithsonian's National Air and Space Museum invites the public to stroll through half a century of spacewalks. "Outside the Spacecraft: 50 Years of Extra-Vehicular Activity" presents artifacts that relate the continuing story of EVA.
07 January 2015, 05:11 PM ET
SpaceX's Falcon 9 rocket and Dragon cargo capsule are now scheduled to blast off from Cape Canaveral Air Force Station in Florida at 4:47 a.m. EST Saturday. You can watch the launch live here on Space.com, beginning at 3:30 a.m. EST.
07 January 2015, 04:00 PM ET
Newly announced discoveries by NASA's Kepler space telescope suggest that the first true alien Earth may not elude planet hunters for much longer.
07 January 2015, 03:12 PM ET
Skywatchers have a chance to spot the bright planet Jupiter and the moon sparkling brightly in the sky tonight, weather permitting, but only if you know when and where to look.
07 January 2015, 02:50 PM ET
7500 light-years away, Eta Carinae's pair of ‘superstars’ (30 and 90 solar masses) outshine our Sun more than 6 million times over, whipping up a frenzy of stellar winds.
07 January 2015, 02:38 PM ET
The bright green Comet Lovejoy C/2014 Q2 is shining at its best this week as it passes through the constellation Eridanus, the Heavenly River. Here's how to see it.
07 January 2015, 11:47 AM ET
The GAO rejected a protest filed by Sierra Nevada Corp. of commercial crew development contracts NASA awarded in September to two other companies.
07 January 2015, 11:23 AM ET
SpaceX has passed NASA's "certification baseline review," which required the California-based company to outline exactly how it plans to ferry crews to and from the orbiting lab using Dragon and its Falcon 9 rocket.
07 January 2015, 11:20 AM ET
The Higgs boson, the so-called 'God particle,' could have destroyed the universe shortly after the Big Bang, but the force of gravity saved the cosmos, scientists say.
07 January 2015, 11:12 AM ET
A careful study of images taken by the NASA rover Curiosity has revealed intriguing similarities between ancient sedimentary rocks on Mars and structures shaped by microbes on Earth. The findings suggest, but do not prove, that life may have existed ear
07 January 2015, 07:13 AM ET
A telescope in Chile has captured a striking 'dark nebula' acting as a cosmic shroud to hide hundreds of baby stars from view about 700 light-years from Earth. See the images and video.
07 January 2015, 07:11 AM ET
The moon harbors lots of potentially valuable raw materials, but it's hard to pinpoint one that will drive an entire extractive industry, experts say.
07 January 2015, 07:10 AM ET
The Lynds Dark Nebula 483 (LDN 483), located 700 light-years away in the constellation Serpens, blocks hundreds of background stars from the view of the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile.
06 January 2015, 05:52 PM ET
Ashwin Vasavada, of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, has succeeded John Grotzinger as Curiosity project scientist, agency officials announced Monday (Jan. 5).
06 January 2015, 05:09 PM ET
A European lander currently hibernating on a comet, did not successfully sample the icy body using a drill after the probe made its historic comet landing in November.
06 January 2015, 04:45 PM ET
Eight newfound alien planets appear to orbit in their parent stars' habitable zone — that just-right range of distances that may allow liquid water to exist on a world's surface — and all of them are relatively small, researchers said.
06 January 2015, 02:00 PM ET
NASA's Kepler Space Telescope has discovered its 1,000th alien planet, further cementing the mission's status as a space-science legend. Kepler has found more than half of all known exoplanets to date, and the numbers will keep rolling in.
06 January 2015, 10:30 AM ET
A tiny, self-contained greenhouse has been selected to fly on the robotic lander that Red Planet colonization effort Mars One intends to launch in 2018, group representatives announced today (Jan. 5).
06 January 2015, 09:52 AM ET
Amazing new images of the Eagle Nebula's iconic Pillars of Creation from the Hubble Space Telescope reveal how the nebula has changed 20 years after Hubble's first photo of the region.
06 January 2015, 07:00 AM ET
Researchers at Sandia National Laboratory can recreate conditions inside the sun, and have found that things don't behave the way they should.
06 January 2015, 06:23 AM ET
The private spaceflight company SpaceX aborted the planned launch of a Dragon cargo ship on Tuesday (Jan. 6) due to an actuator issue on the craft's Falcon 9 rocket. The next launch try is slated for Friday, Jan. 9.
05 January 2015, 07:45 PM ET
In a first for space flight, SpaceX will attempt to fly its Falcon 9 booster rocket to a safe landing aboard an offshore platform.
05 January 2015, 07:29 PM ET
SpaceX will try to bring the first stage of its Falcon 9 rocket back to Earth for a precision landing on a floating platform Tuesday morning. But there's no guarantee the ambitious maneuver will work.
05 January 2015, 06:03 PM ET
The famous feature of the Eagle Nebula has been revisited by the space telescope. It has delivered an incredible infrared light image to go along with new visible light imagery.
05 January 2015, 05:48 PM ET
Researchers from the Harvard-Smithsonian Center for Astrophysics (CfA) are developing a 'clock' to decipher stellar age from their spin.
05 January 2015, 03:55 PM ET
Engineers have found a way to buy some time for the MESSENGER spacecraft, which was due to end its four-year mission in March with a suicidal plung
05 January 2015, 03:04 PM ET
Early-bird skywatchers along the eastern United States have an opportunity, weather permitting, to see the private spaceflight company SpaceX launch a robotic Dragon capsule to the International Space Station before dawn on Tuesday (Jan. 6).
05 January 2015, 01:57 PM ET
Alien worlds more massive than Earth could harbor long-lasting oceans, according to new research. Scientists have used computer modeling to show that so-called 'super-Earth' planets.
05 January 2015, 01:42 PM ET
Skywatchers will be treated to a fascinating ballet of the so-called Galilean moons throughout the month, as the satellites pass one another, sometimes blocking (occulting) or casting shadows (eclipsing) and casting shadow onto Jupiter’s cloud tops.
05 January 2015, 12:00 PM ET
The twin Voyager probes have been discovered ... in the year 3300 AD.