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Mars Orbiter Image Shows Comet Nucleus is Small - 10/20/2014
A camera on NASA's Mars Reconnaissance Orbiter has taken the highest-resolution image ever made of an Oort Cloud comet, taking advantage of the comet's Mars flyby.Read More >>More on Comet Siding Spring >>
All Three NASA Mars Orbiters Healthy After Comet Flyby - 10/19/2014
NASA's Mars Reconnaissance Orbiter Studies Comet Flyby - 10/19/2014
Animation of Comet Siding Springs’ Close Encounter With Mars - 10/09/2014
Comet Siding Spring C/2013 A1 will make a very close flyby of Mars on Oct. 19, 2014.Watch Video >>
BLOG: Investigating Underground Martian Ice with Impact Craters - 08/26/2014
Imagine if there was a layer of ice as tall as a 13-story building underneath the entire state of Texas. We have found a layer of ice that big under a region of Mars called Arcadia Planitia.Read Blog >>
Tall Boulder Rolls Down Martian Hill, Lands Upright - 08/13/2014
A new photo from NASA's MRO shows a trail made from by a giant boulder tumbling downhill.Read More >>Related Image >>
Recent Videos
Comet Siding Spring: A Close Encounter with Mars - 10/09/2014
Comet Siding Spring C/2013 A1 will make a very close flyby of Mars on Oct. 19, 2014. NASA is taking steps to protect its Mars orbiters, while preserving opportunities to gather valuable scientific data.Watch Video >> Watch Animation >>
Colliding Atmospheres: Mars vs Comet Siding Spring - 08/06/2014
Comet Siding Spring is about to fly historically close to Mars. The encounter could spark Martian auroras, a meteor shower, and other unpredictable effects. Whatever happens, NASA's fleet of Mars satellites will have a ringside seat.Watch Video >>
Mars Weathercam Helps Find Big, New Crater - 05/22/2014
How before-and-after pictures led to the discovery of a fresh meteor impact crater on Mars.Watch Video >>
Dry Ice Moves on Mars
Is frozen carbon dioxide a key to features in some Martian gullies? To find out, scientists grabbed a bag of dry ice and took a road trip.More >>
Marks On Martian Dunes May Be Tracks Of Dry-Ice Sleds
NASA research indicates hunks of frozen carbon dioxide -- dry ice -- may glide down some Martian sand dunes on cushions of gas similar to miniature hovercraft, plowing furrows as they go.More >>
Mars’ Whirling Dust Devil
Animation of a skinny "dust devil" on the dust-covered Amazonis Planitia region of northern Mars.More >>
Where is the Orbiter?
Where is the Mars Reconnaissance Orbiter?
View the simulated views and computer generated images of where Mars Reconnaissance Orbiter is now.More >>
Mars in The Palm of Your Hands
Tune in with Mars on the go.Download the Be A Martian App, on your Android, iPhone, Windows Phone and Tablets!More >>
Come explore Mars with us
Be part of exploration and discovery, and personally contribute to the expansion of human knowledge for all of us now, and as a legacy for those who follow.More >>
Eyes on the Solar System
"Eyes on the Solar System" is a 3-D environment full of real NASA mission data. Explore the cosmos, including Mars from your computer. Fly with NASA's Voyager 2 spacecraft. See the entire solar system moving in real time. It's up to you. You control space and time.More >>
Ask Dr. C
Have you ever wondered why Mars is red?
Or, how long does it take for Mars to orbit the sun? Ask Dr. C, your personal Mars expert!More >>