CJ7, I got to ask a bona fide Astronaut, who just happened to be a physicist, a question that has always bugged me.
Any time we look up into the heavens, we are looking at the past. If a star is 1 million light years away, it took that light 1 million years to reach us.
He was on the subject of objects that were at the far reaches of the Universe, he was talking in terms of billions of light years.
So I asked him. If what we see happenned billions of years ago, what is going on there now, at this very minute. That object certainly is not the same, and for all we know, might not even exist anymore. And if it doesn't exist, what is there now in it's place.
He had no answer. And he thought hard about it too.
Some of this stuff they come up with is simply mind boggling.
Originally Posted by Jackie S
pretty sure I read/saw that there are only 130 people in the world capable of answering questions like you posed ... space jocks dont make that cut.
having seen stars vanish in Hubble pics we wont notice them being gone with the naked eye for millions or billions of years ..
boggling for sure.
I love that stuff.