19 March 2015, 07:00 AM ET
NASA's MAVEN spacecraft spotted ultraviolet "Christmas light" auroras dancing in the Red Planet's atmosphere for five days leading up to Dec. 25, 2014.
17 March 2015, 10:00 PM ET
For about 50 years, humanity has sent orbiters, probes and landers to the Red Planet. Here's a look at all of the missions to Mars to date, both the successes and the failures.
16 March 2015, 01:42 PM ET
The Zodiac (arc of the planets, Sun and Moon) hosts the cosmic crab of Cancer and Earth's most famous twin brothers throughout March 2015. Jupiter rules the southeastern sky. Saturn rises after midnight.
15 March 2015, 11:29 AM ET
NASA launched a new space-weather mission and scientists found evidence of a hydrothermal system on Saturn's ocean-bearing moon Enceladus. Here's a look at Space.com's top stories of the week.
14 March 2015, 12:32 PM ET
From a monster solar flare to a spectacular night launch, don't miss these amazing space images of the week for March 15, 2015.
13 March 2015, 07:00 AM ET
Curiosity transferred powdered rock sample from its robotic arm to an analytical instrument on its body on Wednesday (March 11), and then drove about 33 feet (10 meters) toward the southwest on Thursday (March 12), NASA officials said.
12 March 2015, 07:02 AM ET
Traditional spacecraft-sterilization techniques can get rid of most microbes. But a new method is emerging that might be able to take all of them out, even the hardiest of the hardy.
11 March 2015, 07:00 AM ET
The site lies at about 4 degrees north latitude and 136 degrees east longitude. It's the leading candidate for NASA's InSight lander, which is scheduled to launch in March 2016 and touch down on Mars in late September of that year.
10 March 2015, 08:30 AM ET
If a robot plunges into the ocean of an icy moon, perhaps near Saturn or Jupiter, its main problem will be figuring out what to do next. Even at light speed, it takes hours for communications to pass back and forth to Earth.
09 March 2015, 04:00 PM ET
Opportunity has paused to study some intriguing rocks just before its odometer ticks over to 26.2 miles (42.195 kilometers) — the equivalent of a marathon.
08 March 2015, 12:48 PM ET
A powerful camera spotted a comet and scientists captured images of a supernova four different times. Here are Space.com's pics for the top space stories of the week.
06 March 2015, 06:31 PM ET
The Feb. 27 short circuit that has halted some of the science work by NASA's Mars rover Curiosity, apparently originated in the robot's rock-boring drill, space agency officials announced Friday (March 6).
05 March 2015, 02:01 PM ET
Ancient Mars likely once had an ocean large enough to cover 20 percent of the Martian surface, a fifth of the planet, scientists say. But over time, most of that water was lost to space.
05 March 2015, 12:01 PM ET
About 4.5 billion years ago, the Red Planet was a much wetter place. New isotopic measurements of Mars by several ground-based telescopes on Earth reveal a new map of where the water laid and a model of water loss over time can be constructed.
04 March 2015, 06:33 PM ET
March should be a great month for spotting planets for skywatchers, weather permitting. Venus is becoming increasingly more prominent in the evening sky, remaining above the horizon for 2.5 to 3 hours after the sun dips below the horizon
04 March 2015, 07:22 AM ET
The car-size Curiosity rover suffered a "transient short circuit" on Feb. 27 while it was transferring sample powder from its robotic arm to instruments on the robot's body, NASA officials said.
03 March 2015, 02:00 PM ET
Put six people into an isolated environment for months at a time, and lots of things can happen: frustration, conflict, or at best — a tight-knit group of people working happily for a common goal.
28 February 2015, 03:32 PM ET
From a record-setting parafoil flight to a newly-tested space plane, don't miss these amazing space images of the week for March 1, 2015.
27 February 2015, 07:45 AM ET
Curiosity drilled into a rock called Telegraph Peak on Tuesday (Feb. 24), collecting sample powder for analysis by its onboard instruments. The rover has now drilled into three different rocks at the base of the towering Mount Sharp.
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.
26 February 2015, 09:40 AM ET
The Gemini Twins and a dimmer Cancer constellation make their way into the night sky in March.
24 February 2015, 10:16 PM ET
One day I imagine that humanity will be able to visit other planets in the Solar System, and venture even further to other stars, but this has always seemed very far away. That’s the reason why I applied for the Mars One mission.
24 February 2015, 06:14 PM ET
The photo, which was released today (Feb. 24), is a composite of dozens of images taken in late January by Curiosity's Mars Hand Lens Imager. The mosaic provides a great view of the "Pahrump Hills" outcrop at the base of the huge Mount Sharp.
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.
18 February 2015, 05:14 PM ET
Mars, Venus and the moon will meet up in a particularly beautiful cosmic display Friday. If you've been watching the evening twilight sky over the past few weeks, you will have seen the brilliant planet Venus gradually moving away from the sun, setting sl
18 February 2015, 02:53 PM ET
In a Mars environment, it appears even brewing may be possible.
17 February 2015, 04:00 PM ET
Mars would not be an easy home for human colonists. See how its lower gravity, thin atmosphere and lack of a magnetic field could make it challenging for a colonist in this Space.com infographic.
17 February 2015, 04:00 PM ET
Life on Mars would be full of chilly weather, large dust storms and geological sights dwarfing anything on Earth.
17 February 2015, 12:31 PM ET
A mystery is brewing on Mars: Amateur astronomers spotted enormous plumes erupting off the Red Planet's surface, leaving scientists puzzled.
17 February 2015, 07:50 AM ET
A new study of emissions from Martian volcanoes suggests there is no activity going on right now, but researchers aren't ruling out recent eruptions.
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.
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.
11 February 2015, 03:30 PM ET
Opportunity has now covered 26.094 miles (41.994 kilometers) since touching down on Mars in January 2004, leaving the rover just 660 feet (200 meters) shy of the marathon milestone, NASA officials said today (Feb. 10).
11 February 2015, 01:08 PM ET
On March 18th, 1965, Alexey Leonov stepped out of his Voskhod 2 spacecraft to become the first man to complete an extra vehicular activity (EVA) in space.
11 February 2015, 07:00 AM ET
The search for life on Mars presents us with many challenges – not the least of which is microbial contamination. How do we ensure that microbes from Earth don't hitchhike all the way to the Red Planet and spread there?