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Mars

First Mars was the setting of imaginary declining civilizations; then it was a dead, cratered, Moon-like world. Thanks to a coordinated Mars exploration program that began in 1996 and continues to the present day, we now know Mars better than any world other than our own, yet we have more questions than ever.

Geologically, Mars is quiescent, but its atmosphere breathes and changes from year to year, interacting in complex ways with the water sequestered in Mars' ice caps and permafrost. Water does not, today, flow on Mars, but it evidently has in the past, and it may flow again in the future when Mars' rotation axis tilts much more steeply. Did Mars ever look like Earth, or has it always been as cold and dry as an Antarctic desert? Has there ever been the right combination of liquid water, available energy, and time to permit life to begin on Mars?

Latest Blogs from Mars

MSL: Landing site downselections

Posted by Emily Lakdawalla on 2007/10/29 02:19 CDT

After three days of presentations, voting, and extended discussions, the "Mars community," as represented by something over 100 scientists who decided to attend the second Mars Science Laboratory (MSL) landing site selection meeting in a process that was open to all, have narrowed down to six the number of potential MSL landing sites.

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A Checkup on Future Mars Missions

Posted by Van Kane on 2014/06/09 04:59 CDT | 3 comments

NASA’s Mars Exploration Analysis Group (MEPAG) recently reviewed plans by Europe, the Japanese, and NASA for future Mars exploration. The prognosis is for another exciting decade of Mars exploration.

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More Mars

Mars' Calendar

Mars' axial tilt is similar to Earth's, and its days (or sols) are similar in length, so it has similar seasons. But its elliptical orbit makes seasons more extreme in the southern hemisphere. This page lists dates for seasonal changes and turnover of Mars Years.

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Missions to Mars

The missions, both successful and failed, that have flown by, orbited, or landed on the Red Planet and its moons

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