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NASA's Apollo missions already sent astronauts to the moon from 1969 to 1972. But scientists say there's still lots of good science to do there. The moon also could be an ideal stepping stone to Mars.
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A new study indicates that the relatively low mass of Mars allowed most of its water to be lost to space billions of years ago, rather than retained on its surface.
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The NASA rover traversed some 21 feet of terrain this week, in its first test drive since landing on the red planet. It also captured photos of its touchdown site and the wheel tracks it left behind.
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Six off-the-shelf cameras comprised the spacecraft's EDL Cam system (Entry, Descent and Landing). Together they provided a spectacular view of the Rover's arrival on the red planet.
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As the world looks back at the Apollo mission, NASA Administrator Jim Bridenstine looks ahead to the "moon shot" of the modern era: landing a human on Mars.
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NASA's six-wheeled rover landed on the red planet in January 2004 for what was billed as a 90-day mission. The plucky robot was still going until a dust storm on Mars last summer killed it.
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There's a new probe on Mars. After Monday's tricky landing, NASA's InSight spacecraft is to deploy a sensitive seismometer and temperature probe to let scientists explore the planet's interior.
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Scientists say they've found what appears to be a briny lake near the south pole on Mars. It's possible that some kind of microbial life once lived in the lake.
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NASA plans to send people to the Red Planet in the 2030s. In the meantime, a remote location in southern Utah serves as a non-NASA training ground for the Mars-minded.
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The Schiaparelli lander detached from its mothership, the Trace Gas Orbiter, on Sunday. It's expected to make a controlled landing on the Red Planet on Wednesday.