- #1
foxpoint11
- 3
- 0
I thought i understood a light year as a measure of distance.But i keep running into articles that say something like ...around Galaxy NCG 4921 there are a cluster of galaxies estimated to be 13+ billion years old at a distance of 320 light years from earth.How do you get that when you are measuring red shifts?
Or how do you get "there are globular clusters that appear older than the known universe?"
Thank you for any help.
Or how do you get "there are globular clusters that appear older than the known universe?"
Thank you for any help.