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Atom & Cosmos

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March 30 landing of Falcon 9 rocket

RECYCLED ROCKET  A SpaceX Falcon 9 rocket successfully landed on a droneship in the Atlantic Ocean after blasting off from NASA’s Kennedy Space Center on Thursday, March 30. This stage of the rocket has flown before, marking the first time the company has reused one of its reclaimed boosters.

MAVEN probe

LOST IN SPACE  Solar wind has expelled two-thirds of the Martian atmosphere’s argon and a majority of its carbon dioxide into space, data from the MAVEN probe (illustrated here) suggest.

a backwards asteroid orbit

IN REVERSE  Jupiter’s trip around the sun is accompanied by many asteroids (white), which travel in the same direction as the planet. But scientists have found one, Asteroid 2015 BZ509 (green), that orbits backward.

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