- #1
buzzdiamond
- 22
- 0
If something is supposedly 1 billion light years away from us, how are we able to calculate this..? Wouldn't we have to send a light out and/or x/-ray out to that point and have it bounce back, calculating the time it takes to bounce back to us..? If so, it will take 1 billion years to get there and 1 billion years for the light and/or x/-ray to return, therefore rendering this process too long for us to even calculate.
Having said that, if we can truly even see something that far away, how big must that object be compared to our sun..? From the estimations I've read about, that the closest star, Alpha Centuri, which is supposedly 4.3 light years away, only has the size of it as about the same as our sun. That seems to be grossly erroneous, imo..!
If we can see a star and it's that far away, my guestamation is that Alpha Centuri has to be X(umteen) times bigger than our sun.
Your thoughts...
Having said that, if we can truly even see something that far away, how big must that object be compared to our sun..? From the estimations I've read about, that the closest star, Alpha Centuri, which is supposedly 4.3 light years away, only has the size of it as about the same as our sun. That seems to be grossly erroneous, imo..!
If we can see a star and it's that far away, my guestamation is that Alpha Centuri has to be X(umteen) times bigger than our sun.
Your thoughts...