r/BeAmazed • u/billibillibillendar • Nov 27 '24

Science If you travel close to the light

18.1k Upvotes

95% Upvoted

802 comments sorted by

View all comments

Show parent comments

7

u/LaserGadgets Nov 27 '24

Yeah, but thats the feel, he made it sound like its a min for the way to andromeda and 3M years for the way back :p bit confusing.

Interstellar showed its not that simple. You visit a planet and your ship in orbit is 20 years older.

32

u/[deleted] Nov 27 '24

It would take a minute to travel either way, but at least 4 million years would have passed on Earth.

It’s the Twin Paradox with Earth acting as the twin that stayed behind.

4

u/LaserGadgets Nov 27 '24

Huh? When its 1 light year away...it takes a year, at the speed of light.

5

u/Still-Wash-8167 Nov 27 '24

It’d be 1 year from an outside observer’s perspective who is not experiencing time dilation. For the traveler, they would not experience any time because time dilation is infinite at the speed of light.