22 April 2013, 07:00 AM ET
A bold Mars flyby slated for 2018 will make its closest approach on Mars' night side.
19 April 2013, 03:37 PM ET
Thank you the reader, for your dedication and support. We're so excited to be an Official Honoree in the 2013 Webbys.
18 April 2013, 05:41 PM ET
The site also snagged the honor in 2010.
18 April 2013, 05:00 AM ET
Sex in space could present some challenges, but that won't stop people from trying.
16 April 2013, 06:30 AM ET
Mars One aims to land four people on Mars in 2023.
15 April 2013, 12:57 PM ET
Despite dangers, plenty of people want to fly by Mars.
15 April 2013, 11:00 AM ET
NASA scientists have found that a comet will almost certainly safely fly past Mars next year.
15 April 2013, 10:51 AM ET
Curiosity has been busy since landing on the Red Planet last August.
11 April 2013, 07:00 AM ET
The REAL Space Act would help safeguard American leadership in space, its sponsors say.
10 April 2013, 06:08 PM ET
The mission is in its early stages, but some details are already emerging.
10 April 2013, 04:24 PM ET
The energy source that fuels the sun and other stars could propel rockets that take humans to other planets.
10 April 2013, 07:00 AM ET
The mission is challenging but achievable, experts say.
09 April 2013, 06:30 AM ET
No commands will be sent to all four active NASA Mars explorers for the next few weeks.
08 April 2013, 04:21 PM ET
The new results from NASA's Curiosity rover bolster longstanding suspicions about the Red Planet's air.
08 April 2013, 07:00 AM ET
Progress made over the next year will determine whether the Mission for America gets off the ground in 2018.
08 April 2013, 07:00 AM ET
NWA 7325 may be too old to have plausibly come from the solar system's innermost planet.
05 April 2013, 05:16 PM ET
The money should jump-start an ambitious program to send astronauts to a space rock in 2021.
04 April 2013, 02:52 PM ET
Night sky photographer Tamas Ladanyi of The World at Night captured this stunning view over the historic city of Pécs, Hungary.
04 April 2013, 07:00 AM ET
Mars is on the other side of the sun from Earth, making communications difficult.
03 April 2013, 05:57 PM ET
A 16-student team drew up plans for a manned visit to the Mars moon Phobos.
03 April 2013, 03:27 PM ET
A Mars Reconnaissance Orbiter camera (HiRISE) has been snapping imagery of the used parachute on the Martain surface, along with the backshell it is attached to. It is the largest parachute of its kind ever constructed - about 65 feet in diameter.
02 April 2013, 07:30 AM ET
The Skylab II outpost would be a modified hydrogen tank from NASA's Space Launch System rocket.
01 April 2013, 07:00 AM ET
Curiosity may have found traces of salty perchlorates in Rocknest, a potential hint of life's building blocks.
29 March 2013, 01:02 PM ET
The pioneering Apollo astronaut plots his vision for the future of space exploration in a new book to be released this spring.
29 March 2013, 12:35 PM ET
The comet ISON is making what astronomers believe is its first trip through the inner solar system, taking a sweltering pass by the sun (making ISON a 'sungrazing' comet) and then back past Earth in December.
29 March 2013, 11:38 AM ET
This space wallpaper is a mosaic showing part of the Noctis Labyrinthus region, the ‘Labyrinth of the Night’, on Mars. It was composed by Bill Dunford using scenes available in the Mars Express image archive, HRSC view.
27 March 2013, 09:00 PM ET
A recently discovered comet will make an uncomfortably-close planetary flyby next year — but this time it’s not Earth that's in the cosmic crosshairs.
27 March 2013, 07:00 PM ET
The two small bodies that orbit the red planet raise a number of questions about the formation of the early solar system.
26 March 2013, 01:47 PM ET
Curiosity had been recovering from a memory issue since late February.
25 March 2013, 04:46 PM ET
The Caltech Space Challenge runs all week.
22 March 2013, 07:50 PM ET
Private companies and nonprofit organizations are planning deep space missions to the moon, asteroids and even Mars.
22 March 2013, 07:00 AM ET
NASA won't send commands to its various Mars explorers for much of April.
21 March 2013, 06:52 PM ET
The moon's orbit brings it 6 feet closer to the red planet every century.
21 March 2013, 06:48 PM ET
Deimos' radius is only 3.9 miles. The tiny moon zips around Mars in only 30 hours and is so close to its parent planet that it was missed for centuries.
19 March 2013, 07:11 PM ET
Curiosity has still not resumed science operations, however.
19 March 2013, 02:01 PM ET
The Department of Energy has made its first plutonium-238 in a quarter century.