What's Under This Hole on the Surface of Mars?
Lava tubes are underground caves that could provide shelter for astronauts visiting Mars. This hole could provide access to one.
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Lava tubes are underground caves that could provide shelter for astronauts visiting Mars. This hole could provide access to one.
Human visitors to Mars need somewhere to shelter from the radiation, temperature swings, and dust storms that plague the planet.
The Moon reaches Last Quarter as it travels past several planets in the sky this week. Plus, pick up a comet, star clusters, and more!
Japan is now officially part of an elite Moon-landing club.
Japan's first moon lander is furiously doing science after staying asleep for more than a week. How long it can keep going remains unclear.