26 February 2015, 01:38 PM ET
Going to Mars without setting up a colony — round-trip manned missions, in other words — would not be enough for the U.S. to reclaim its leadership in space, nor would setting up human outposts on the moon, Aldrin said.
25 February 2015, 03:40 PM ET
An American astronaut found water inside his spacesuit helmet at the end of an otherwise flawless spacewalk outside the International Space Station today (Feb. 25), but he was never in any danger, NASA officials say.
24 February 2015, 02:00 PM ET
A recent action by the U.S. Federal Aviation Administration is stirring up some moon dust in a legal debate about private companies setting up shop on the moon.
23 February 2015, 04:35 PM ET
Boeing and the United Launch Alliance are building a new astronaut access tower for Atlas rocket launches of future space taxis for NASA. See how it works.
23 February 2015, 01:26 PM ET
Ceres, orbiting between Mars and Jupiter, has almost no gravity, warmth or atmosphere.
23 February 2015, 01:16 PM ET
This is definitely a new kind of space race. Two teams competing in a private moon competition have teamed up to get to the lunar surface by the end of next year, potentially sowing the seeds for a lunar NASCAR race.
21 February 2015, 04:46 PM ET
Europe's last cargo spacecraft came down to Earth in a fiery blaze and scientists reported seeing mysterious plumes emanating from Mars. Here are Space.com's picks for the best space stories of the week.
21 February 2015, 12:42 PM ET
From mysterious plumes on Mars to a space station made of matchsticks, don't miss these amazing space images of the week for Feb. 22, 2015.
21 February 2015, 11:29 AM ET
A company that aims to send tourists to the edge of space in a balloon broke a record today, flying a parafoil higher than anyone has before.
21 February 2015, 10:32 AM ET
Two NASA astronauts successfully completed a 6 hour spacewalk that helped prepare the International Space Station for the arrival of private space taxis. The astronauts are scheduled to compete two additional spacewalks in the next 8 days.
21 February 2015, 12:30 AM ET
Two NASA astronauts will perform a spacewalk outside the International Space Station today (Feb. 21). People on Earth can watch the spacewalk live online.
20 February 2015, 11:55 AM ET
NASA this week begins work to reassemble parts of the International Space Station to create parking spots for two commercial space taxis.
19 February 2015, 10:39 PM ET
SpaceX is a private spaceflight company that regularly delivers payloads to the International Space Station via its Dragon spacecraft.
16 February 2015, 02:28 PM ET
Mars One, which aims to land four pioneers on the Red Planet in 2025 as the vanguard of a permanent colony, has whittled its pool of astronaut candidates down to 100, organization representatives announced Monday.
15 February 2015, 09:23 AM ET
Europe launched a prototype minishuttle on its first space test, SpaceX lofted the DSCOVR space-weather satellite, and scientists questioned whether dark matter is truly "dark." Here are Space.com's picks for the best space stories of the week.
14 February 2015, 12:40 PM ET
From a colorful cosmic "flower" to a smiley face in space, don't miss these amazing space images of the week for Feb. 15, 2015.
13 February 2015, 07:37 AM ET
Would you die on Mars? The Guardian interviewed three people that want to do just that as part of Mars One — a privately funded one-way mission to Mars planned to launch in the 2020s.
12 February 2015, 02:00 PM ET
A SpaceX rocket launching the spaceflight company's first mission to deep space came in for a smooth landing in the ocean after the launch Wednesday (Feb. 11), as another piece of the rocket captured an incredible view of Earth from space.
11 February 2015, 06:30 PM ET
A private rocket carrying a space weather satellite, built to help warn Earthlings before a potentially dangerous solar storm strikes the planet, blasted off to orbit today from Florida.
11 February 2015, 02:48 PM ET
Rough seas have scuttled SpaceX's plan to land the first stage of its Falcon 9 rocket on a robotic drone ship in the Atlantic Ocean after today's launch of the DSCOVR space-weather satellite.
10 February 2015, 07:50 PM ET
The Dragon spacecraft splashed down Tuesday (Feb. 10) at 7:44 p.m. EST in the Pacific Ocean off the coast of Baja California. The unmanned capsule had departed from the space station about 5 1/2 hours earlier, at 2:10 p.m. EST.
10 February 2015, 06:20 PM ET
High upper-level winds scrubbed SpaceX's planned launch of the DSCOVR space-weather satellite today, which will also feature a bold attempt to land the first stage of the company's Falcon 9 rocket on a drone ship in the Atlantic Ocean.
10 February 2015, 03:03 PM ET
SpaceX plans to convert a launch pad into a landing pad for the reusable rocket boosters it is developing to power its Falcon family of rockets.
10 February 2015, 03:00 PM ET
Life on the moon would be very different for explorers than life on Earth. See how in this Space.com infographic.
10 February 2015, 02:35 PM ET
SpaceX's robotic Dragon capsule is on its way back to Earth after spending one month attached to the International Space Station, marking the start of a big day for the private spaceflight company.
10 February 2015, 11:14 AM ET
Orbital ATK formed from the merger of Orbital Sciences Corp. and the Aerospace and Defense groups of Alliant Techsystems Inc. The merger was finalized Monday (Feb. 9), and Orbital ATK marks its first full day of operations today (Feb. 10).
10 February 2015, 07:00 AM ET
SpaceX aims to launch the DSCOVR space weather satellite, land the first stage of its Falcon 9 rocket in a reusability test and bring its Dragon cargo capsule safely down to Earth, all in the span of a few hours.
09 February 2015, 10:35 AM ET
The launch of a new satellite designed to monitor space weather has been delayed another day.
08 February 2015, 06:29 PM ET
The commercial launch company SpaceX aborted the planned launch of a long-awaited space weather satellite and a novel rocket landing test Sunday due to problems with a U.S. Air Force radar tracking system.
08 February 2015, 02:32 AM ET
The private spaceflight company SpaceX will attempt the ultimate space double-header today (Feb. 8) with the launch of a space weather observatory followed by an ambitious rocket landing attempt on a floating platform in the Atlantic Ocean.
07 February 2015, 02:22 PM ET
When SpaceX launches a long-delayed satellite on Sunday, the company hopes to do the amazing: return a rocket to Earth and land it on a floating platform in the Atlantic Ocean.
06 February 2015, 07:00 AM ET
All seven crewmembers, who will spend two weeks at the Mars Desert Research Station near the Utah town of Hanksville, are astronaut candidates for Mars One's Red Planet colonization effort.