- #1
Chris Miller
- 371
- 35
- TL;DR Summary
- Would distance to Hubble horizon (distance over which expansion = c) increase, decrease or remain the same when traveling near c.
Consider the Hubble horizon as the proper distance over which Hubble expansion equals c, so that you are in the center of a Hubble sphere with a radius of about 13.5 billion light-years. As you approach light speed in any direction, does the Hubble horizon draw closer in that direction due to length contraction? Or does time dilation increase your measure of the Hubble constant? I'm imagining zipping through galaxies in milliseconds while their inhabitants watch me come and go for eons. Where is my Hubble horizon? What is the shape of my Hubble sphere?