What Happened to Early Mars' Atmosphere? New Study Eliminates One Theory

The amount of Martian atmosphere trapped by mineral formation appears inadequate to account for a warm environment when rivers cut valleys on ancient Mars.

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Curiosity Mars Rover's Approach to 'Pahrump Hills'

Curiosity Mars Rover's Approach to 'Pahrump Hills'

This southeastward-looking vista from the Mast Camera (Mastcam) on NASA's Curiosity Mars rover shows the "Pahrump Hills" outcrop and surrounding terrain seen from a position about 70 feet (20 meters) northwest of the outcrop. Credit: NASA/JPL-Caltech/MSSS

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Solar System Missions

Cassini-Huygens to Saturn
Studying Saturn and its rings and moons.
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Dawn, the first spacecraft ever planned to orbit two different bodies after leaving Earth, will orbit Vesta and Ceres, two of the largest asteroids in the solar system.
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The Epoxi mission recycles the already "in flight" Deep Impact spacecraft to investigate two distinct celestial targets of opportunity.
Mission overview

The Juno spacecraft, currently making its way to Jupiter, will for the first time peer below Jupiter's dense cover of clouds to answer questions about the gas giant and the origins of our solar system.
Mission overview

Mars Exploration Rovers
Spirit and Opportunity have been exploring Mars since January 2004. Clues found in some rocks indicate liquid water once covered the ground.
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Mars Reconnaissance Orbiter
This orbiter has the most powerful telescopic camera ever to another planet, plus five other scientific instruments.
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Mars Science Laboratory
(MSL) spacecraft -- which includes the newest Red Planet rover, the car-sized Curiosity.
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Mars Odyssey
This orbiter studies Mars' surface composition and radiation environment and has instruments to detect water and shallow buried ice.
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Microwave Instrument on Rosetta Orbiter
This JPL instrument will study gases given off by a comet as the European Space Agency's Rosetta spacecraft orbits the comet. Rendezvous with the comet is scheduled for 2014.
Rosetta home page

Voyager 1 and 2 flew past Jupiter and Saturn. Voyager 2 also flew by Uranus and Neptune. Voyager 1 is now approaching interstellar space.
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The planet Saturn, viewed by NASA's Cassini spacecraft during its 2009 equinox. At Saturn, One of These Rings is not like the Others

One section of Saturn's rings may be loaded with chunks of solid ice, possibly shards from a destroyed moon, according to a new study by Cassini scientists.

Read more (Sep. 2)

This artist concept shows Comet Hitchhiker Comet Hitchhiker Would Take Tour of Small Bodies

A concept for orbiting and landing on multiple asteroids and comets is being developed at JPL.

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Ceres Dawn Sends Sharper Scenes from Ceres

The closest-yet views of Ceres, delivered by NASA's Dawn spacecraft, show the small world's features in unprecedented detail, including Ceres' tall, conical mountain; crater formation features and narrow, braided fractures.

Read more (Aug. 25)

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What's Up - September 2015 What's Up - September 2015

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50 Years of Mars Exploration 50 Years of Mars Exploration

The first 50 years of successful NASA missions to the Red Planet.

Crazy Engineering: Gecko Gripper Crazy Engineering: Gecko Gripper

How geckos inspired a new NASA technology that makes things stick to each other in space.

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