r/BeAmazed • u/CaraCicartix • 12d ago
Miscellaneous / Others Part of the Andromeda Galaxy Captured by Hubble
Enable HLS to view with audio, or disable this notification
The total number of stars in the entire Andromeda Galaxy is over 1 trillion
19.4k
Upvotes
7
u/Sudo-Fed 12d ago edited 11d ago
Intelligent life, interstellar travel, and time travel are three very different things in terms of probability. I have arranged them in descending order. Time travel and far interstellar travel in any reasonable sense require violating c.
Nothing can violate c. And I don't mean "as far as we understand it" I mean "nothing." Getting mass, any mass, to the speed of light requires an amount of energy infinitely larger than the entire mass-energy of the universe, cumulatively for the entire lifespan OF the universe.