Comment on If something could rotate infinitely after being initially pushed, would the initial push disqualify it from being classed as perpetual motion?
If a rock is moving between galaxies, what would make it stop?
Does a given mass ever get outside the influence of both galaxy’s gravity influences?
Why not? When two galaxies collide some rocks can get enough speed to escape.
AFAIK galaxies don’t collide, they merge. There is usually no collision due to the massive empty spaces inbetween stars.
I know it’s not a “physical collision”. But the gravity “redesigns” both galaxies and some objects can be accelerated beyond the scape velocity of the galaxies combined.
Nomad@infosec.pub 1 week ago
Does a given mass ever get outside the influence of both galaxy’s gravity influences?
bufalo1973@piefed.social 1 week ago
Why not? When two galaxies collide some rocks can get enough speed to escape.
Nomad@infosec.pub 1 week ago
AFAIK galaxies don’t collide, they merge. There is usually no collision due to the massive empty spaces inbetween stars.
bufalo1973@piefed.social 1 week ago
I know it’s not a “physical collision”. But the gravity “redesigns” both galaxies and some objects can be accelerated beyond the scape velocity of the galaxies combined.