Where is the end of road, railway track and sky. PLEASE TELL CORRECT ANSWER NOT JUST FOR GAINING POINTS
Answers
Answer:Depends what you mean by “Sky”.If you mean the edge of Earth's atmosphere; then it's 300 miles with most of its mass being in the closest 10 miles from the surface.
If you mean the observable universe; then it's “edge” is a little…harder to explain.
Because the universe is constantly expanding, the light we can see from the past is much farther than the light we could see if something at the current edge were to be able to instantly be visible to us on Earth.
At this moment, light leaving from a place that is 13.7 billion light years from Earth would reach us in 13.7 billion years. But light 13.8 billion years away would never reach us because the universe will continue to expand faster than that light will ever be able to to. The fabric of spacetime is simply spreading out faster than light at that distance from us.
However, because light has left objects all the way back to the time of The Big Bang, we can see that light because the distance that light has traveled has already are it close enough to not be as effected by the expansion taking place. These ancient light echoes of the distance past can be seen up to a maximum of 46.5 billion light years away.
I hope that answers your question.
Explanation:
Answer:
Answer:Depends what you mean by “Sky”.If you mean the edge of Earth's atmosphere; then it's 300 miles with most of its mass being in the closest 10 miles from the surface.
If you mean the observable universe; then it's “edge” is a little…harder to explain.
Because the universe is constantly expanding, the light we can see from the past is much farther than the light we could see if something at the current edge were to be able to instantly be visible to us on Earth.
At this moment, light leaving from a place that is 13.7 billion light years from Earth would reach us in 13.7 billion years. But light 13.8 billion years away would never reach us because the universe will continue to expand faster than that light will ever be able to to. The fabric of spacetime is simply spreading out faster than light at that distance from us.
However, because light has left objects all the way back to the time of The Big Bang, we can see that light because the distance that light has traveled has already are it close enough to not be as effected by the expansion taking place. These ancient light echoes of the distance past can be seen up to a maximum of 46.5 billion light years away.
I hope that answers your question.