Quote:
Originally Posted by foxy mars  Ok, then. 4.6 billion years ago, then it was a fireball. |
No - 13.5BY since the big-bang fireball and 4.5BY since earth and the solar system formed
Sorry but "a long time ago and nobody was there" won't do. I sometimes record stuff with my astro-cam that's a long way off measured in the time light takes [@ 300,000km/s] to get here from these distant objects some 2-12 billion light-years [BLY] away so at least I like to know.
If desparate to know the answer in earthly kilometers then multiply 'light-year' value by 300000 x60 x60 x24 x365.25 - thus 2-12BLY is quite manageable by comparison
