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18 September 2015, 07:51 AM ET
Halfway through his 342-visit to the ISS, astronaut Scott Kelly talks about what he's looking forward to, and what he misses.
18 September 2015, 07:38 AM ET
"Optical mining" could allow huge amounts of asteroid water to be tapped, advocates say. This water, in turn, could provide relatively cheap and accessible propellant for voyaging spacecraft, lowering the cost of spaceflight significantly.
18 September 2015, 07:27 AM ET
Learn what makes a big full moon a true 'supermoon' in this SPACE.com infographic.
18 September 2015, 07:00 AM ET
NASA has been overly optimistic about its manned Red Planet plans in the past. But the agency's current goal of getting astronauts to Mars by the end of the 2030s is eminently achievable, NASA chief Charles Bolden said.
17 September 2015, 06:54 PM ET
Backlit by sunset over Pluto, NASA's New Horizon's probe captured rugged ~11,000ft (3,350m) mountains and wide glaciers of nitrogen ice. To quote Principal Investigator Alan Stern: "Pluto is surprisingly Earth-like...and no one predicted it."
17 September 2015, 05:14 PM ET
In a new video, an enormous cluster of sunspots rotates across the sun's face before gradually separating into several distinct groups, which also fired off a bunch of solar flares.
17 September 2015, 04:53 PM ET
Express AM8 is owned by the RSCC of Moscow, which has suffered from Proton’s error-prone record in the past six years more than any other company.
17 September 2015, 04:37 PM ET
The photo, which New Horizons took during its epic July 14 flyby of Pluto, captures a sunset view. Towering ice mountains cast long shadows, and more than a dozen layers of the dwarf planet's wispy atmosphere are clearly visible.
17 September 2015, 02:22 PM ET
Lead actor Matt Damon describes how Ridley Scott's film – and Andy Weir's book – can perk students’ curiosity, in this conversation with Space.com's @DavidSkyBrody at NASA's Jet Propulsion Lab.
17 September 2015, 12:59 PM ET
NASA, Obama, MIT and more hailed teenaged Ahmed Mohamed, who was arrested at school Monday when teachers mistook his homemade electronic clock for a bomb.
17 September 2015, 07:43 AM ET
On Sept. 27, skywatchers throughout the Americas, Europe, Africa and western Asia will witness a total eclipse that happens to occur when the moon looks abnormally large and bright in Earth's sky. Here's the science behind the "supermoon eclipse."
17 September 2015, 07:31 AM ET
The Square Kilometer Array (SKA), currently planned to begin construction in 2018, could enable the search for intelligent life to piggy-back on other scientific observations, scouring the galaxy with unprecedented precision.
17 September 2015, 07:30 AM ET
Private spaceflight company SpaceX released a series of gorgeous images that show its crewed Dragon capsule touching down on the Red Planet.
17 September 2015, 01:08 AM ET
In this artist's conception, SpaceX's Dragon spacecraft lands on Mars.
17 September 2015, 12:41 AM ET
This fantastic space wallpaper depicts what one artist envisions as the scene when SpaceX's Dragon spacecraft lands on Mars.
16 September 2015, 09:43 PM ET
16 September 2015, 06:24 PM ET
Seven images were taken by Philae's ROLIS instrument from 219 Feet (67 meters) to 30 Feet (9 meters) of Comet 67P/Churyumov-Gerasimenko surface.
16 September 2015, 05:45 PM ET
The Solar and Heliospheric Observatory (SOHO), a joint effort of NASA and the European Space Agency, spotted comet number 3,000 on Sunday (Sept. 13). The landmark discovery was pulled out of SOHO's database by Worachate Boonplod of Thailand.
16 September 2015, 05:45 PM ET
Daredevil sungrazing comets risk annihilation every time they skim the surface of our star. Here's how the Solar and Heliospheric Observatory tracks these comet interlopers.
16 September 2015, 05:25 PM ET
During an award ceremony last month, the organization Shades of Blue recognized Nichelle Nichols — Lt. Uhura from the original "Star Trek" series — for her role in recruiting women and minorities to become NASA astronauts.
16 September 2015, 03:51 PM ET
Orion's first crewed sojourn, known as Exploration Mission 2 (EM-2), is targeted for launch in August 2021. But after conducting a thorough review of the Orion program last month, NASA now says EM-2's liftoff will occur "no later than April 2023."
16 September 2015, 03:40 PM ET
NASA rolled out the red carpet for two 'Red Planet' movie actors, providing a behind-the-scenes look at the agency's real journey to Mars with the stars from "The Martian." The cast members visited the agency's Johnson Space Center in Houston.
16 September 2015, 03:00 PM ET
French designers propose an innovative shelter for Mars.
16 September 2015, 02:55 PM ET
Here's a brief rundown of how Jeff Bezos, Elon Musk, Paul Allen and Richard Branson are helping shape the exploration and exploitation of space.
16 September 2015, 02:51 PM ET
A slight wobble in the orbit of Saturn's moon Enceladus can only be explained by a global ocean beneath its crust.
16 September 2015, 10:45 AM ET
The NASA/ESA Solar and Heliospheric Observatory captured what is thought to be the Kreutz sungrazer comet's final moments. It was most likely vaporized on closest approach on Sept. 16th, 2015.
16 September 2015, 10:15 AM ET
Smaller and older than the Milky Way, and very close by, the Sculptor Dwarf Galaxy is lurking right in plain sight, easy to miss. But studying the faint satellite galaxy is revealing more about how groups of stars form and evolve.
16 September 2015, 10:00 AM ET
About 280,000 light years from Earth, the Sculptor Dwarf Galaxy contains many very old stars. It’s diffuse nature lets light from very distant galaxies through to the seniors of the La Silla Observatory.
16 September 2015, 07:48 AM ET
Starting with the waxing crescent moon tonight (Sept. 16), skywatchers with binoculars or small telescopes can spot the moon's geographic features in vivid detail. Here's how, and what to look out for.
16 September 2015, 07:21 AM ET
A sweeping new panorama from NASA's Curiosity rover shows petrified sand dunes stretching across the jagged Mount Sharp on Mars.
16 September 2015, 07:20 AM ET
The Self-deployable Habitat for Extreme Environments (SHEE) project is developing domiciles that could serve as Mars or moon bases.
16 September 2015, 12:26 AM ET
Drones can bring eyes and ears to emergency responders soon after disaster strikes.