Submitted by No_Adhesiveness_6821 t3_11ag1e2 in space
WULTKB90 t1_j9s8uzm wrote
Reply to comment by PyrorifferSC in Dark energy faster than speed of light? by No_Adhesiveness_6821
Relative distance does change, but the galaxies aren't being pushed apart, rather more space is appearing between them, like a balloon being inflated, if you put 2 dots on the balloon then blow it up the dots don't move, rather the space between them grows, so they aren't moving faster than the speed of light, it is only faster when observed relative to an observer with enough distance.
When it comes to distances far enough out that they are receding away from an observer faster than light can travel the information from them is lost to the observer, without FTL travel the observer could never reach those locations so no information is traveling faster than the speed of light.
PyrorifferSC t1_j9s9dur wrote
That makes sense, thank you!
ieatdirt44 t1_j9shupj wrote
"So no information is traveling faster than the speed of light"---this is the key distinction. I feel like we are on the verge of no longer saying the speed of light, but the speed of causality or information seems more relavant.
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