is_this_the_place t1_j6k553l wrote on January 30, 2023 at 10:12 PM

Reply to comment by zeratul98 in ELI5: How do we know that light is the fastest thing in existence? by Grump-Dog

How fast does gravity travel?

ntbananas t1_j6k5gj6 wrote on January 30, 2023 at 10:14 PM

The effects of gravity propagate at the same speed

https://en.wikipedia.org/wiki/Speed_of_gravity

mesonofgib t1_j6k5q1u wrote on January 30, 2023 at 10:16 PM

At c as well. For example, if the sun suddenly disappeared we wouldn't know about it in any way for 8 minutes or so. Then the lights would go out and the Earth's path through space would change.

Chadmartigan t1_j6k5jrl wrote on January 30, 2023 at 10:15 PM

Same speed, c.