12 September 2014, 05:48 PM ET
NASA is staunchly defending the science plans for its flagship Mars rover Curiosity in the wake of a recent senior-level review that at times harshly criticized the mission's science operations.
11 September 2014, 01:09 PM ET
The Mars Science Laboratory Curiosity is heading to the "Pahrump Hills" outcrop (seen above the scale bar). The rover's Mast Camera (Mastcam) imaged the 'Amargosa Valley' as it would appear to humans if placed on Earth.
10 September 2014, 01:20 PM ET
Having traveled 25 miles since landing in 2004, the long-lived NASA rover snapped an image that included several hundred yards of its tracks as it rolled along the rim of Along the rim of Mars Endeavour Crater on Mars.
10 September 2014, 06:45 AM ET
An excerpt from "Curiosity," Rod Pyle's new book about NASA's $2.5 billion Mars Science Laboratory mission.
09 September 2014, 07:01 AM ET
Two spacecraft on their way to Mars are performing well as they close in on the Red Planet this month.
08 September 2014, 06:40 AM ET
NASA is looking for a place to land its next Mars rover on the Martian surface. Expected to launch in 2020, the space agency asked scientists where they'd like to see the rover land on the Martian surface.
05 September 2014, 06:50 AM ET
The Netherlands-based nonprofit Mars One, which aims to land four astronauts on the Red Planet in 2025, announced today (Sept. 4) that it's raffling off a round-trip suborbital flight aboard XCOR Aerospace's Lynx rocket plane.
02 September 2014, 04:00 PM ET
The time has come -- the little Mars rover needs its first memory wipe.
02 September 2014, 10:53 AM ET
In the evening, Mars and Saturn can be seen in the southwestern sky. Jupiter can be viewed in the eastern sky in the early morning hours. Also, the Moon adds additional light for farmers to harvest their crops.
02 September 2014, 10:08 AM ET
The reflection of sunlight off of cosmic dust particle creates the effect known as "zodiacal light", sometimes called the "false dawn." (Best seen from mid-September to early October).
30 August 2014, 09:03 AM ET
Look up this Labor Day weekend to see a lovely celestial tableau in the southwestern part of the evening sky.
26 August 2014, 05:45 PM ET
Mission team members had been considering drilling a rock dubbed "Bonanza King" but scrapped the idea after pre-drilling activities suggested that the stone is not stable enough. Curiosity has instead resumed the long drive to the towering Mount Sharp.
23 August 2014, 09:28 AM ET
A photo from NASA's Curiosity rover on Mars set the Internet abuzz this week with claims that the robot had found a "thigh bone" on the Red Planet. But not so fast. That so-called bone? Just a weathered Martian rock, NASA officials say.
22 August 2014, 06:00 AM ET
Scientists discuss what makes Jupiter's moon Europa perhaps the solar system's best bets for hosting life beyond Earth.
21 August 2014, 06:50 AM ET
The researchers discovered the microscopic oval object within the Nakhla Mars meteorite, which fell to Earth in Egypt in 1911. While the structure's appearance is intriguing, it most likely formed as a result of geological rather than biological processes
20 August 2014, 01:01 PM ET
The discovery of a microbial ecosystem deep beneath the Antarctic ice doesn't necessarily mean that life teems on frigid worlds throughout the solar system, researchers caution: subglacial Lake Whillans is not a closed system like Jupiter's moon Europa.
19 August 2014, 11:01 AM ET
Uwingu launched its "Beam Me to Mars" project today (Aug. 19), inviting people to contribute, for a fee, to a "digital shout-out" that will send messages from Earth to the Red Planet on Nov. 28 — the 50th anniversary of Mars exploration.
18 August 2014, 03:38 PM ET
The 1-ton Curiosity rover had been heading for Mount Sharp via Hidden Valley, a sandy swale that's about the length of a football field. But Curiosity turned back shortly after entering the valley, finding the sand surprisingly slippery.
15 August 2014, 04:01 PM ET
NASA's next Mars lander, now under construction, will probe the inner workings and early stages of the Red Planet's development billions of years ago.
14 August 2014, 12:03 AM ET
Call it a case of Mars rock and roll ... literally. NASA's Mars Reconnaissance Orbiter has snapped an amazing photo of the track left by a boulder rolling down a slope on Mars.
08 August 2014, 06:04 PM ET
An amazing new video from NASA shows viewers the ups and downs of the first test of a system that could one day help the space agency land huge spacecraft on Mars or other planets.
08 August 2014, 02:07 PM ET
Planets with atmospheres are prime candidates for exploration. NASA deploys its Low-Density Supersonic Decelerator to find fuel saving ways to land heavy rovers and possibly people. Principal Investigator Ian Clark narrates this supersonic test run.
05 August 2014, 06:00 PM ET
The Netherlands-based nonprofit Mars One, which aims to land four settlers on the Red Planet in 2025, has launched a new project called 'Mars Exchange' to help answer questions and spur discussion about the group's ambitious plans.
05 August 2014, 01:01 AM ET
Curiosity, which landed inside Mars' huge Gale Crater on Aug. 5, 2012, is just 1,650 feet from an outcrop that’s part of Mount Sharp, the 3.4-mile-high mountain that’s drawing Curiosity like a big, dusty beacon in the Red Planet sky.
04 August 2014, 07:00 AM ET
NASA's Mars rover Curiosity marks two years on Mars Tuesday (Aug. 5). The rover's first two years have been full of big finds, and researchers are eager to see what Curiosity finds when it scales the foothills of the towering Mount Sharp.
01 August 2014, 07:33 AM ET
NASA's next Mars rover could help humans get a foothold on the Red Planet.
31 July 2014, 03:24 PM ET
NASA's Mars 2020 mission will send a car-size rover to the Red Planet to collect samples. See how the Mars 2020 rover will work in this Space.com infographic.
31 July 2014, 02:48 PM ET
Mars and Saturn get together with the crescent moon for a planetary 3-way on August 31st and Venus and Jupiter get together on August 18th. The Perseids Meteor Shower peaks on Aug 11-13.
31 July 2014, 02:41 PM ET
See photos and images of NASA's next Mars rover, a 1-ton robot launching toward the Red Planet in 2020.
30 July 2014, 07:29 PM ET
Space agency officials will reveal the science gear they've chosen for the rover, which will launch toward the Red Planet in 2020, on Thursday at 12 p.m. EDT. You can watch the announcement live here at Space.com, courtesy of NASA TV.
28 July 2014, 05:19 PM ET
As of Sunday (July 27), Opportunity had traveled a total of 25.01 miles on the Red Planet, NASA officials said. The record had been held by the Soviet Union's remote-controlled Lunokhod 2 rover, which covered 24.2 miles on the moon in 1973.
28 July 2014, 07:01 AM ET
The founding population of an interstellar colony should consist of 20,000 to 40,000 people, one expert says. Such a large group would possess a great deal of genetic and demographic diversity, giving the settlement the best chance of survival.
25 July 2014, 03:37 PM ET
This NASA-produced video combines a greatest hits retrospective of past spaceflight with suggestions of humans-to-asteroid and Mars missions, plus animation of a yet unbuilt heavy lift launch vehicle.
25 July 2014, 11:27 AM ET
Curiosity has just crossed out of its landing ellipse, the 12- by 4-mile(19 by 7 kilometers) zone targeted for its August 2012 touchdown and is now moving toward an increasingly challenging landscape called the Zabriskie Plateau.
22 July 2014, 07:00 AM ET
The second Hawaii Space Exploration Analog and Simulation mission, known as Hi-SEAS 2, wraps up on Friday (July 25), ending four months of simulated Red Planet exploration on Hawaii's Mauna Loa volcano.
21 July 2014, 05:05 PM ET
Actor Morgan Freeman grilled NASA astronauts on the International Space Station about how their work can get humans to Mars someday.