- #1
tonyxon22
- 75
- 5
I have heard and read many times and I’ve also seem many pictures about galaxies that are 13.000 million light years away. One of my favorites (actually I have it as my cell phone’s wallpaper) is the famous “Hubble Space Telescope Ultra Deep Field”.
The doubt that I’ve always had is related to when “they” state that given the distance of those galaxies, it took 13.000 million years to their light to reach us. At the same time, it think about the fact that the Universe is approximately only 700 million years older than that light, and that it has been continuously expanding.
So every time I look at those pictures (which is essentially every 10-15 minutes ‘cause I have it on the cell phone) if find myself asking these questions:
1) How far away could those galaxies be from us at that moment (13.000 million years ago)?
2) It is possible to have a Universe bigger than 13.000 million light years only 700 million years after the Big Bang?
3) Have they always been at that distance from us? (that does not makes much sense for me since the universe is expanding, so I would expect them to be farther away now)
4) Were they closer back then? If so, how come the light took that amount of time to reach us?
Maybe these are very basic concepts, but I have a hard time understanding the facts considering the limit of the speed of light and the young age of the universe when this light was emitted.
Thanks and best regards,
The doubt that I’ve always had is related to when “they” state that given the distance of those galaxies, it took 13.000 million years to their light to reach us. At the same time, it think about the fact that the Universe is approximately only 700 million years older than that light, and that it has been continuously expanding.
So every time I look at those pictures (which is essentially every 10-15 minutes ‘cause I have it on the cell phone) if find myself asking these questions:
1) How far away could those galaxies be from us at that moment (13.000 million years ago)?
2) It is possible to have a Universe bigger than 13.000 million light years only 700 million years after the Big Bang?
3) Have they always been at that distance from us? (that does not makes much sense for me since the universe is expanding, so I would expect them to be farther away now)
4) Were they closer back then? If so, how come the light took that amount of time to reach us?
Maybe these are very basic concepts, but I have a hard time understanding the facts considering the limit of the speed of light and the young age of the universe when this light was emitted.
Thanks and best regards,