crazzz t1_j1gv7tf wrote on December 24, 2022 at 6:14 AM

Reply to comment by Shadowkiller00 in Did you know it will still take 46 billion years to cross the universe at the speed of light? 65 mph = 4.8 * 10^17 years! by NotAndroid545

How do you measure that if it’s faster than the speed of light

Shadowkiller00 t1_j1h7dqr wrote on December 24, 2022 at 8:55 AM

You are not measuring it directly you are observing certain things, like the rate that other galaxies are moving away from us, and using the red shift observed to calculate the speed is moving away, and then you extrapolate based on how far away things are from us that they must be moving away that much faster.