- #1
cosmogrl
- 27
- 0
From Olbers' paradox, the night sky is dark because the universe is finite in age, so some stars' light hasn't had time to reach us. BUT, we see the CMB which occurred some 13 billion years ago (14 billion maybe?) So, if light from the cmb has had time to reach us, shouldn't every object's light have had time to reach us? If all the stars we see in the night sky are within our galaxy, which is only 75000 lyr across, shouldn't we be able to see all the stars if we can see the cmb 13 billion lyr ago. I'm not considering dust extinction or anything like that that would prevent us from seeing the stars, just the light travel time and the observable universe.