Solar System
The top news about what's going on in the cosmic neighborhood—from planet nine to the sun, and everything in between.
Latest in Solar System
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Why Does Sunlight Lighten Hair But Darken Skin?
![Mars Needs Colonists Who Eat Meat And Sleep Late](https://www.popsci.com/wp-content/uploads/2019/03/18/K5NIACTXJOVKLFCRX5MRKSMCC4.jpg?w=680)
International Space Station
Mars Needs Colonists Who Eat Meat And Sleep Late
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Science
The Search For The Real Planet X
![Mars. A snapshot of the whole planet.](https://www.popsci.com/wp-content/uploads/2019/03/18/5GARMJOSI7YCULDAZKEYNGGORE.jpg?w=450)
International Space Station
Official Report Pokes More Holes In NASA’s Plan To Get To Mars
![Audi Built A Moon Rover](https://www.popsci.com/wp-content/uploads/2019/03/18/PKSQQ3V65V754QY5FZWBSAY7IE.jpg?w=675)
Moons
Audi Built A Moon Rover
![How Will We Eat On Mars?](https://www.popsci.com/wp-content/uploads/2019/03/18/OOU7EV4KZMGSOJLSAVUIEDSDRY-scaled.jpg?w=661)
International Space Station