this post was submitted on 01 May 2025
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What if someone made a life size cardboard cutout of the sun? (infosec.pub)
submitted 1 month ago by Ludrol@szmer.info to c/bestoflemmy@lemmy.world
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https://lemmy.today/comment/15949456

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[–] Ludrol@szmer.info 14 points 1 month ago (1 children)

I don't get your concern.

Cardboard cutout is flat. We set the cutout to be the size of the sun. When the time starts affecting it, yes the gravity tries to collapse it onto the sphere but mass stays the same and gravity exerted "outside" is the same.

[–] bufalo1973@lemm.ee 4 points 1 month ago (1 children)

Even if it's flat, gravity works in that direction (radial).

[–] Ludrol@szmer.info -1 points 1 month ago (1 children)

Yes, and?

[–] bufalo1973@lemm.ee 2 points 1 month ago (1 children)

Put a sheet of paper vertical and let gravity do its work. What happens? Then think about a BIG "sheet" that has gravity by itself. You end up with a ball.

[–] Ludrol@szmer.info -1 points 1 month ago

yes:

  1. that ball has 10^18^ kg mass
  2. that ball falls on earth and burns all the oxygen (debatable) or the cutout falls on earth like a big wrapper and burns evenly.