Mars

Gliese 581 g shot to the top of a list put out by researchers at the University of Puerto Rico at Arecibo’s Planetary Habitability Laboratory (PHL) after a new study marshaled support for its long-debated existence

The U.S.S.R.'s Venera 4 was the first spacecraft to return data from inside another planet's atmosphere

The MAVEN mission will investigate Mars's upper atmosphere, in an attempt to understand what caused it to disappear

The annual Texas gathering of planetary scientists featured new research from across the solar system, as well as a good deal of anger directed at politicians looking to cut back on planetary exploration

A report from Roscosmos, the Russian space agency, dismisses assertions that mismanagement plagued the Phobos-Grunt mission, but observers remain skeptical of that position

Liquid remains the leading explanation for newly discovered streaks on Martian slopes

Two Congressmen expressed concern that the 2013 budget proposal takes away from NASA's robotic missions to Mars

John Carter is the latest in a string of movies set on the Red Planet that have all wound up in the red, financially. John Matson reports

New discoveries are making chlorophyll-d and a cyanobacterium named Acaryochloris marina interesting for scientists trying to find life on extrasolar planets

The online Slooh Space Camera will broadcast a free, real-time feed of the Mars opposition, beginning at 11:00 P.M. EST

The Red Planet looks to have been home to a large body of water billions of years ago

Subdued seasonality might be linked to the emergence of complex life on Earth around 600 million years ago