- #1
daniel_i_l
Gold Member
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I read that we've recently found that the universe is expanding at an accelerated rate by observing the fact that objects that are further away from us are redshifted more and thus going faster were:
v = H*d
were H is the rate that the universe is expanding.
But if the universe is expanding faster and faster then wouldn't light comeing from further away and LONGER AGO in time be redshifted less since the more we go back in time the slower the universe is expanding? (it's getting faster over time)
How do we look at objects far away, see that they are receding faster than close ones and infer about the rate of expansion now (in acceleration, the further away an object is the faster it moves cause if for example the universe is doubling itself every X years then after that amount of time an object will have doubled it's distance from us so the further it is the more it goes in X years -Is That Right??) by light that's coming from millions of years ago?
Thanks.
v = H*d
were H is the rate that the universe is expanding.
But if the universe is expanding faster and faster then wouldn't light comeing from further away and LONGER AGO in time be redshifted less since the more we go back in time the slower the universe is expanding? (it's getting faster over time)
How do we look at objects far away, see that they are receding faster than close ones and infer about the rate of expansion now (in acceleration, the further away an object is the faster it moves cause if for example the universe is doubling itself every X years then after that amount of time an object will have doubled it's distance from us so the further it is the more it goes in X years -Is That Right??) by light that's coming from millions of years ago?
Thanks.