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Q&A How much mass does an object in low earth orbit need to create visible gravitational effects on the surface?

The question stems from watching a scene from ID2 and seeing the massive alien mothership landing/crashing on the North Atlantic. What mass would a starship, or any other artificial object constru...

2 answers  ·  posted 6y ago by Sava‭  ·  last activity 6y ago by Sava‭

Question space spaceships physics shipbuilding ships astrophysics