Next step for Martian missions

MAVEN: The satellite’s scouting mission will sample Mars’s ‘air’ at a cost of $485 million. This is an artist's illustration.

Billions of years ago, Mars was a very different place. But at some point, the strong magnetic field that protected the red planet mysteriously disappeared, allowing “solar winds” to swoop in and run amok. Scientists guess that the resulting climate change is why Mars now has such a weak atmosphere and no liquid water on the surface of the planet.

To help investigate this theory, the National Aeronautics and Space Administration (NASA) unveiled its latest mission to Mars: a satellite that will circle Earth’s neighbor and taste the upper layers of its atmosphere. Called the Mars Atmosphere and Volatile EvolutioN, or MAVEN, this spacecraft will “provide the first direct measurements ever taken to address key scientific questions about Mars’s evolution,” says Doug McCuistion, director of Mars exploration. The satellite will also double as a communications array for other missions on the planet, such as relaying information to robotic rovers on the ground.

NASA scheduled MAVEN’s blastoff for 2013 and plans for the craft to reach Mars’s orbit by the fall of 2014.

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