How is it that the universe can be 13.7 billion years old, but somehow 93 billion light-years wide?
- Tom SLv 72 months ago
Because space is expanding.
- robertoLv 62 months ago
CAN possibly might be, the oldest and farthest light we can observe,started out 13.something billion yea could be,rs ago,,beyond which we can only speculate,,wonder what is beyond that boundary
- Ronald 7Lv 72 months ago
Because of its Volume
13.7 Billion Light Years Cubed
Anybody want to buy a Calculator ?
- ZheiaLv 62 months ago
The light from when an object was 13.7 billion light years away will have reached us, and we would be seeing the object as it was 13.7 billion years ago. But in the meantime, over those 13.7 billion years, the object would have moved further through space. If we were able to see the object as it was now, at this moment, it would be 46.5 billion light years away.
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- MARKLv 72 months ago
I do not understand why think the size of the universe in light years should be the same as its age in light years. That would assume one of two things. First, the universe suddenly appeared 13.7 billion years ago and was instantly 13.7 billion years in diameter. The second, is that the universe has steadily increased in size by 1 light year per light year in time.
The size of the universe is the result of its expansion from the singularity. It did not do this at a constant velocity by it accelerated. There is no reason at all why the universe should by 13.7 light years wide.
I am not an astronomer but the answer only requires a little thought. A little thought would have rendered this question unnecessary
- nineteenthlyLv 72 months ago
Because the expansion accelerates, and since space itself is expanding rather than masses that doesn't violate special relativity.
- Jeffrey KLv 62 months ago
In the 13 billion years that some light has been traveling to us, the universe has been expanding. The stars that emitted that light are now 46 billion light years away from us. That makes a diameter of the visible part of the universe about 92 billion light years.
- BillLv 62 months ago
don't understand distance and speed do you
13.7 billions is years of age
93 billion light years is the distance traveled at the speed of light.
to put it in terms that you can understand -- you are 10 years old and the distance from you to the other side of the world is 36,000 miles
- 2 months ago
Because the rate of expansion is greater than the speed of light. We view objects such as galaxies moving away rather quickly, which seems to be the universe stretching and expanding.
- samiamrdLv 72 months ago
So you assume that the galaxies are moving apart at the speed of light? Why would you assume that they can move that fast? Also, they are fighting gravity at the same time. That is assuming that they started expanding from the same point in the universe.