18 October 2014, 07:01 AM ET
Comet Siding Spring — unknown and undiscovered until 2013 — will zoom past the Red Planet Sunday afternoon (Oct. 19) in an encounter that could help scientists better understand how the solar system came to be.
17 October 2014, 07:38 AM ET
In a rare celestial event, a comet will pass closer to Mars than the moon is from Earth on Oct. 19, 2014. See how the Comet Siding Spring flyby of Mars works in this Space.com infographic.
17 October 2014, 07:30 AM ET
Comet Siding Spring will zoom within 87,000 miles of Mars at 2:27 p.m. EDT on Sunday (Oct. 19). Scientists will observe the flyby using the fleet of spacecraft already at Mars, studying the comet and any effects its dust has on the planet's atmosphere.
16 October 2014, 07:00 PM ET
Comet Siding Spring C/2013 A1 will fly within 87,000 miles of the surface of the Red Planet, causing NASA to alter the positions of their satellite fleet to evade the debris.
16 October 2014, 07:00 AM ET
A new analysis has pinpointed a few purported problems with the blueprint laid out by the Netherlands-based nonprofit Mars One, which aims to land four people on the Red Planet in 2025 as the vanguard of a permanent settlement.
15 October 2014, 01:17 PM ET
The Indian Space Research Organization's Mars Orbiting Mission (MOM) captured imagery of the tiny moon transiting the Red Planet In October 2014.
15 October 2014, 07:50 AM ET
An excerpt from Marc Kaufman's "Mars Up Close: Inside the Curiosity Mission," which was published in August 2014 by National Geographic.
14 October 2014, 05:49 PM ET
At first glance you'd be forgiven for thinking NASA's Mars rover Curiosity had stumbled across a wind-rippled lake or sea at the base of Mount Sharp.
13 October 2014, 07:00 AM ET
Comet Siding Spring, also known as C/2013 A1, will miss the Red Planet by just 87,000 miles (140,000 kilometers) at 2:27 p.m. EDT (1827 GMT) Sunday. For comparison, the moon orbits Earth at an average distance of 239,000 miles (384,600 km).
10 October 2014, 11:45 AM ET
An excerpt from Marc Kaufman's 'Mars Up Close: Inside the Curiosity Mission,' which was published in August 2014 by National Geographic.
09 October 2014, 05:06 PM ET
NASA's fleet of Red Planet orbiters and rovers will be watching on Oct. 19, when Comet Siding Spring zooms within 87,000 miles of Mars.
08 October 2014, 10:50 AM ET
A California energy company is using laser technology originally developed to search for methane on Mars to pinpoint natural gas leaks here on Earth.
04 October 2014, 08:30 AM ET
A NASA-backed study explores an innovative way to dramatically cut the cost of a human expedition to Mars -- put the crew in stasis.
02 October 2014, 12:40 PM ET
Look up to see planets parading across the sky this month. A series of planets, big and small, will reveal themselves to skywatchers on Earth, if weather permits.
01 October 2014, 03:12 PM ET
October 8th brings a Lunar eclipse to North America. On October 19th, Comet Siding Spring (C/2013 A1) will fly within 81,000 miles of the Red Planet. The, on October 23rd, a partial solar eclipse graces Canada most of the US and Mexico.
01 October 2014, 06:30 AM ET
NASA and the Indian Space Research Organisation will investigate ways to collaborate on future Mars missions, officials said Tuesday. The two agencies also laid out their roles on the NISAR Earth-observation mission, which is due to launch in 2020.
01 October 2014, 06:00 AM ET
October brings a number of stargazing treats, including eclipses of the sun and moon, a dependably dazzling meteor shower, and good opportunities to view planets such as Mars, Saturn and Jupiter.
29 September 2014, 03:44 PM ET
After sunset this evening, look 15 degrees up from the southwest horizon. There you’ll see a crescent moon, 30 percent illuminated. Hovering almost directly below it will be Mars, which looks like a moderately bright yellow-orange star.
27 September 2014, 07:00 AM ET
For a couple of hours after nightfall Sunday (Sept. 28), Mars will be a fairly conspicuous light. The Red Planet will have a companion this evening; sitting below and to its left will shine the reddish 1st-magnitude star Antares.
26 September 2014, 07:00 AM ET
On Wednesday (Sept. 24), the 1-ton Curiosity rover drilled 2.6 inches (6.7 centimeters) into an outcrop at the base of the towering Mount Sharp, which rises 3.4 miles (5.5 kilometers) into the Martian sky.
25 September 2014, 01:00 PM ET
NASA's Mars probe is expected to study the atmosphere of the Red Planet in amazing new detail.
25 September 2014, 07:11 AM ET
MAVEN sent home its first images of Mars' upper atmosphere early Monday morning (Sept. 22), just eight hours after entering orbit around the Red Planet.
23 September 2014, 06:00 PM ET
NASA announced a new contest called the Mars Balance Mass Challenge, inviting the public to submit design ideas for dual-purpose spacecraft weight balances for a future Mars mission.
22 September 2014, 11:00 AM ET
The Mars Orbiter Mission (MOM) should finish its 24-minute orbit-insertion burn at 10:11 p.m. EDT Tuesday. Confirmation of the success (or failure) of this crucial maneuver should come to ground control minutes later, mission officials have said.
22 September 2014, 07:00 AM ET
The MAVEN spacecraft executed a picture-perfect orbital insertion burn late Sunday night (Sept. 21), slowing down enough to get captured by Mars' gravity in a Red Planet arrival that had mission team members cheering with excitement and relief.
21 September 2014, 10:40 PM ET
The Mars Atmosphere and Volatile Evolution (MAVEN) was inserted into Mars orbit on September 21st, 2014.
The minutes leading to engine cutoff are explained by the flight systems manager Tim Priser and mission control celebrates the announcement.
21 September 2014, 10:30 PM ET
After a 10-month journey through deep space, NASA's MAVEN probe arrived in Mars orbit late Sunday, on a mission to help determine why the Red Planet changed from a warm and wet place in the ancient past to the cold, arid world it is today.
21 September 2014, 07:30 AM ET
NASA's MAVEN spacecraft, which will study the atmosphere of Mars like never before, arrives at the Red Planet tonight (Sept. 21) and you can watch it live online. Watch the live webcast beginning at 9:30 p.m. ET (0130 GMT).
20 September 2014, 08:19 AM ET
After streaking through space at mind-numbing speeds for 10 months, NASA's MAVEN probe and India's Mars Orbiter Mission (MOM) spacecraft will have to slam on the brakes if they hope to be captured into orbit Sunday and Tuesday.
19 September 2014, 08:53 PM ET
NASA's Mars Atmosphere and Volatile Evolution (MAVEN) mission will take measurements with its Neutral Gas and Ion Mass Spectrometer (NGIMS) that have never been collected before. Dr. James Garvin speaks to Space.com's @TariqJMalik about the mission.
19 September 2014, 07:00 AM ET
Why do NASA and other space agencies keep sending robotic probes to Mars? Because the planet is close to Earth, may be able to support life and is a chief long-term target for human exploration.
18 September 2014, 06:00 AM ET
NASA's MAVEN probe is slated to arrive at the Red Planet around 9:50 p.m. EDT Sunday. The spacecraft's handlers are reporting no problems during the home stretch of its 10-month space journey.
15 September 2014, 07:00 AM ET
A concept mission that would fire scientific missiles at Mars to search for signs of subsurface life is making technical strides, team members say, but it still needs quite a bit of financial help to get off the ground.
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.