General Category > Astronomy & Science

A question I have regarding to water planets and asteroids

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atomic7732:
it would have to be an interstellar object for sure, an object falling from infinity passing the surface of the parent star would not be going fast enough to penetrate through the ocean of a water planet

i think another problem is, even if an object was going "fast enough" to do it, it would break up on impact, and smaller objects are affected by drag (through the atmosphere or water, doesn't matter) more than larger ones due to their cross-section to mass ratio, this is why comet tails are pushed away from the sun due to solar wind, while the comet itself isn't (well... it is, but just a lot lot less)

that's not to mention the energy and mass that the object would lose from colliding with the water and burning up in the atmosphere (and water)

so i don't think it's even physically possible (unless you had an ideal indestructable object)

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