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How long would it take to travel from the end of the universe to Earth?
Well, since the end of the Universe is constantly expanding, and since it would depend on how fast you are going, it could take 1 year to 10000000000000000000000 years or more. There is also very little evidence that the Universe actually has an ending.
If flying at light speed for an Eon is it possible to go beyond the universe?
The universe is about 90 billion light years across. An eon is about 550 million years. Flying at the speed of light for 550 million years you would travel 550 million light years, less than 1% of the distance across the known universe. So, probably not. It would make no difference how long you travel at light speed. If you travel for a billion trillion eons, you would still not pass through the boundries of the universe. For one thing, you would have a serious problem timing your journey, since for you a trip of any length would seem instantaneous.
Why were light years created?
Light years is a measurement of length (not time!), and was taken to use for the purpose of illustrating the wast distances in the galaxy and the universe. One light year is the distance in which light will travel during one year at the speed of Light ~3*10^8 m/s.
What is the equation for the travel time to the nearest star at the speed of light?
The formula to calculate travel time at the speed of light is distance divided by the speed of light. The nearest star to Earth is Proxima Centauri, which is about 4.24 light-years away. Therefore, the travel time to Proxima Centauri at the speed of light would be 4.24 years.
What evidence is there that the universe was different in the past?
We observe the universe with our various telescopes. Since light travels at a finite speed, it takes time for any light to travel from an object (say, a galaxy), to your telescope. Therefore, for any distant object, you are not seeing the object as it appears now, but as it appeared when the light left it.For very distant objects this can be billions of years, and further back in time you look, the more different the universe appears. Beyond about 13 billion years, there are no galaxies, for example.
Is 13.7 billion light-years the radius of the visible universe in light travel distance?
Yes. It is 13.7 billion light-years in radius in light travel distance according to Ned Wright's Cosmology calculator.
If a light beam travels for the entire lifetime of the universe how far does it go?
A light beam that travels for the entire lifetime of the universe would cover a distance of approximately 13.8 billion light-years. This is because the observable universe is estimated to be about 13.8 billion years old in terms of light-travel distance.
How can we know how some parts of the universe looked a million years ago?
Light takes time to travel, so light reaching us from a million light years away has taken that long to travel to us. We see what it looked like when the light left.
How long would it take to travel from the end of the universe to Earth?
Well, since the end of the Universe is constantly expanding, and since it would depend on how fast you are going, it could take 1 year to 10000000000000000000000 years or more. There is also very little evidence that the Universe actually has an ending.
If flying at light speed for an Eon is it possible to go beyond the universe?
The universe is about 90 billion light years across. An eon is about 550 million years. Flying at the speed of light for 550 million years you would travel 550 million light years, less than 1% of the distance across the known universe. So, probably not. It would make no difference how long you travel at light speed. If you travel for a billion trillion eons, you would still not pass through the boundries of the universe. For one thing, you would have a serious problem timing your journey, since for you a trip of any length would seem instantaneous.
How long does it take light to get to earth?
The light takes 8.19 mins (8 mins and 19 secs) to travel from our Sun to the Earth. Light from the stars can take years or billions of years depending on their position in the universe.
How does the fact that light can travel through a vacuum impact our understanding of the universe?
The ability of light to travel through a vacuum allows us to observe distant objects in space and gather information about the universe. This has greatly expanded our understanding of the cosmos, as we can study objects that are millions or even billions of light-years away.
If nothing can travel the speed of light how did you get 15 billion light years away from the edge of the universe in 15 billion years?
We didn't, the big bang was a rapid expansion of space-time. The formation of the universe, not a literal explosion of matter. Really good question though.
What do you think that astronomers mean when they use the term observable universe?
They mean the part of the universe that we can see with the naked eye, through telescope, or the amount of light years we can travel without dying
How many miles across the universe?
The universe is 78 billion light years in radius, 156 billion in diameter. 1 light year is how long it will take you to travel at the speed of light so if it's 78 billion light years in radius then it would take you 78 billion years to travel that far. Also people have said that if you go far enough the number of partial combinations will run out and you will start to see exact replicas of the world you know and love.
How large is empty space?
This is the same question as how big is the universe. The size of the universe is determined by how far light would travel in the years since the Big Bang. So it is a sphere of 13.7 light-years radius. We can't see all the way to the edge, but pretty close.
How many years does it take for light to travel a distance of 40 light years?
It takes light 40 years to travel a distance of 40 light years.
