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Planetary Science

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Titan map

NORTHERN LAKES  Radar images of Titan’s poles show lakes that may form like Earth’s sinkholes. A new topographic map suggests these hydrocarbon lakes may be connected through Titan’s equivalent of groundwater.

illustration of 'Oumuamua

ALIEN ASTEROID  This artist’s representation of interstellar asteroid ‘Oumuamua shows its unusual shape: 400 meters long and just about 40 meters wide. No asteroids in the solar system are shaped like that. 

Cassini mosaic of Saturn

FOND FAREWELL  The Cassini spacecraft took this last look at the Saturn system two days before plunging into the giant planet’s atmosphere. 

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