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

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

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.