19 September 2013, 04:39 PM ET
Skywatchers across parts of the United States and southern Canada have several chances to spot the new private Cygnus spacecraft as it chases the International Space Station across the pre-dawn sky. Weather permitting, it will be possible to see both spac
19 September 2013, 03:28 PM ET
Small, serpentine robots could help Mars rovers collect soil samples from crevices beneath rocks and other hard-to-reach places, and they could pull their wheeled siblings to safety if the bigger vehicles get bogged down in soft sand.
19 September 2013, 03:17 PM ET
Although 2013 was expected to be a year of "Solar Maximum" activity, the Sun has gone disquietingly quiet. It's not a topic for worry, but it has solar scientists scratching their heads.
19 September 2013, 02:21 PM ET
As the possible 'comet of the century' approaches its date with the Sun (Nov. 28th, 2013), the chances of its break-up will increase exponentially. The comet is not on a trajectory to hit the Earth. What will happen to pieces that may break away?
19 September 2013, 02:01 PM ET
NASA's Mars rover Curiosity has revealed no trace of methane, a potential sign of primitive life, on the Martian surface, despite past observations of the gas by spacecraft orbiting the Red Planet and from Earth, researchers say.
19 September 2013, 02:01 PM ET
Scientists have discovered colossal plasma arms reaching out from the nearby Coma Cluster of galaxies. The galactic tentacles are nearly five times the width of our Milky Way and suggest that the cores of turbulent galaxy clusters may be much less chaotic
19 September 2013, 10:13 AM ET
The two Apollo 13 crew members walk through the events of their upcoming EVA.
19 September 2013, 09:26 AM ET
The glittering specks in this cool space wallpaper, resembling a distant flock of flying birds, are the stars that make up the dwarf galaxy ESO 540-31.
19 September 2013, 07:35 AM ET
NASA astronaut Chris Cassidy just landed back on Earth last week after spending more than five months aboard the International Space Station. SPACE.com will have a chance to chat with Cassidy on Thursday (Sept. 19) afternoon. What should we ask him?
19 September 2013, 07:00 AM ET
Comet ISON and Comet Siding Spring will buzz Mars over the course of the next year, prompting excitement and some concern that cometary particles could hit the spacecraft orbiting the Red Planet and exploring its surface.
19 September 2013, 06:00 AM ET
Members of the public, industry professionals and academics have descended upon Houson for the third annual 100-Year Starship symposium, which will discuss what the world needs to do to make interstellar travel a reality in the next 100 years.
18 September 2013, 07:39 PM ET
Canopus is the second-brightest star in the night sky despite its distance from Earth.
18 September 2013, 06:55 PM ET
A small asteroid harmlessly zipped by Earth closer than the orbit of the moon today (Sept. 18). At just 3 to 10 feet in diameter, asteroid 2013 RZ53 would have burned up in Earth's atmosphere if it were on a collision course with the planet.
18 September 2013, 06:00 PM ET
Tonight's full moon is called the Harvest Moon because many fruits and vegetables tend to ripen in the late summer and early fall. Farmers once relied on this full moon's light, working late into the evening to harvest their crops.
18 September 2013, 04:51 PM ET
Water, water everywhere, and some of it fit to drink. That’s the picture of ancient Mars that has emerged during the past few months thanks to discoveries by NASA's Curiosity rover, which has been exploring the Red Planet since August 2012.
18 September 2013, 04:11 PM ET
The seasons will change this Sunday, with the Northern Hemisphere moving into autumn and the South emerging from winter into spring. The celestial event that marks this transition is called an "equinox." What is an equinox, and why does it occur?
18 September 2013, 03:54 PM ET
The mighty roar of a commercial rocket launching a brand-new private cargo ship on a stunning debut test flight from Virginia's Eastern shore today (Sept. 18) has NASA overjoyed and the spaceship's builder beaming with pride.
18 September 2013, 02:54 PM ET
This space wallpaper shows the Soyuz TMA-08M spacecraft with Expedition 36 Commander Pavel Vinogradov, Flight Engineer Alexander Misurkin and Flight Engineer Chris Cassidy, as it lands near the town of Zhezkazgan, Kazakhstan, on Sept. 11, 2013.
18 September 2013, 12:28 PM ET
The third in a series of highly secure U.S. military communications satellites successfully launched in the early morning hours of Sept. 18 aboard a United Launch Alliance (ULA) Atlas 5 rocket from Cape Canaveral Air Force Station, Fla.
18 September 2013, 11:12 AM ET
An Orbital Sciences' Antares rocket carrying the re-supply spacecraft launched from NASA's Wallops Flight Facility in Virginia on September 18th, 2013. This marks the second private company to launch a spacecraft to the International Space Station.
18 September 2013, 11:03 AM ET
An untested commercial spacecraft blasted off on its first trek to the International Space Station today, kicking off a major test flight for its Virginia-based builders and NASA. The unmanned Cygnus vehicle lifted off atop an Antares rocket.
18 September 2013, 10:23 AM ET
Iran announced that it has picked a Persian cat to be its next astronaut, the country's state news agency reported. The flat-faced creature could be a feline forerunner for manned missions to space.
18 September 2013, 10:14 AM ET
Technicians prepare for a test in the Noise Research Program at Lewis Research Center.
18 September 2013, 09:18 AM ET
NASA researchers have pieced together a view of the moon that's impossible from Earth. The amazing new mosaic images and mesmerizing animation show what the moon looks like as it rotates under the sun.
18 September 2013, 06:01 AM ET
There is something fishy about this deep-space cosmic object. A powerful telescope in Chile has produced amazing new photos of a giant stellar nursery known as the Prawn Nebula.
18 September 2013, 06:00 AM ET
A small asteroid first discovered last Friday will whiz by the Earth today (Sept. 18), zipping closer than the orbit of the moon. The space rock poses no danger to Earth, scientists say.
18 September 2013, 12:00 AM ET
A new commercial spaceship, Orbital Sciences' Cygnus vehicle, is poised to launch on a critical test flight to the International Space Station from Virginia's Eastern Shore today (Sept. 18). The Cygnus spacecraft launches atop an Antares rocket.
17 September 2013, 10:36 PM ET
Arcturus is a red giant that is one of the brightest stars in Earth's night sky.
17 September 2013, 07:11 PM ET
An Atlas 5 rocket, crowned with a secure, jam-resistant U.S. Air Force communications satellite set for liftoff Wednesday (Sept. 18), arrived at a launch pad in Florida on Monday (Sept. 16) after a condensed assembly and test campaign.
17 September 2013, 05:31 PM ET
NASA is asking a new community to help them stop killer asteroids from impacting Earth. Agency officials will attend the World Maker Faire in New York City this weekend to enlist the help of innovators to help protect Earth against space rocks.
17 September 2013, 05:25 PM ET
The United States military is kick-starting a suborbital hypersonic vehicle program that also aims to launch payloads into orbit on the cheap. The new XS-1 program is run by the Defense Advanced Research Projects Agency.
17 September 2013, 04:50 PM ET
Scandinavian-based Foundation for Scientific and Industrial Research (SINTEF) believes a great alternative to Mars' rovers maybe slithering robotics. They are working with Norwegian company Robotnor on many uses for the robots.
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