SpaceRef: Mars Today

New images from ESA's Mars Express show the Syrtis Major region on Mars. Once thought to be a sea of water, the region is now known to be a volcanic province dating back billions of years.

Mars may have been arid for more than 600 million years, making it too hostile for any life to survive on the planet's surface

The largest solar particle event since 2005 hit the Earth, Mars and MSL travelling in-between, allowing the onboard Radiation Assessment Detector to measure the radiation a human astronaut could be exposed to en route to the Red Planet.

This mosaic of images taken in mid-January 2012 shows the windswept vista northward from the location where NASA's Mars Exploration Rover Opportunity is spending its fifth Martian winter, an outcrop informally named "Greeley Haven."

Space debris experts confirm estimate for Phobos-Grunt reentry

4th Annual NASA STEM Educators Workshop Series

NASA History Division Summer 2012 Internships

NASA 2012 Planetary Geology and Geophysics Undergraduate Research Program

NASA Live Video Chat: Let's Talk About Meteors, Meteorites and Comets

High Power Microscopes: NASA Virtual Lab Web Seminar

Graph Analysis: Genesis -- NASA Exploring Data Web Seminar

Properties of Living Things: Searching for Life on Mars Web Seminar

Properties of Living Things: Searching for Life on Mars Web Seminar

NASA Mars Odyssey THEMIS Images January 9-13, 2012

According to RIA Novosti: "Phobos-Grunt fragments have crashed down in the Pacific Ocean. The spacecraft fell at about 21:45 on Sunday Moscow time [17:45 GMT]."

Opportunity is positioned for winter on the north end of "Cape York" on the rim of Endeavour Crater. The rover is tilted about 15 degrees to the north for favorable solar energy production.

NASA Mars Odyssey THEMIS Images January 2-6, 2012

NASA Mars Reconnaissance Orbiter HIRISE Images January 11, 2012

Mars Images lets you browse the latest images from the Opportunity Mars Exploration Rover. Scroll through the thumbnails of the latest downlink from Mars and view any image in fullscreen mode.

An international campaign to assess the imminent atmospheric reentry of Russia's Phobos-Grunt Mars craft is being coordinated by experts in ESA's Space Debris Office.