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How do we distinguish old craters from new ones on the Moon?
What are SpaceX's Starship's header tanks?
How does SpaceX plan to deal with possible methane buildup around Starship?
How do EVA suits manage water excretion?
What motivates this species?
Split telescope into two eyes
what is the resolution of the magnitude that is distinguishable to the naked eye?
What is the most REALISTIC cause of a worldwide catastrophe/apocalypse in the near future? (next ~100 years)
What would make the internet go away?
How impermeable are the surfaces of the moon?
Are there any studies or technology envisioned for Mars entry and landing without a parachute?
Is there a reliable way to hide/convey a message in vocal expressions (speech, song,...)
Have carbonaceous chondrite meteors been found on the moon?
Moonlight bright enough to see by
How far can a piece of spacecraft go, where the signal still reaches planet Earth?
Is it possible to send a CubeSat to Saturn/Enceladus?
Photo Competition 2021-04-12: Up There