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How many years does it take light to travel to us from the edges of the universe?
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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 James Webb space telescope going to study?
It is going to replace the Hubble Space Telescope in the year 2018. It will study the edges of the universe, where the light from the creation of the Universe is still in transit to the Earth. So what JWST will do is to look at the past, billions of years ago, when the Universe was only a few hundred million years old. This would help us understand more about the evolution of the Universe.
How can the universe be only some 14 billion years old when it can be contemplated that it could be 20 or 30 or more billions of years old?
The universe is actually about 15 billion years old. I'm not sure where you got the statistic that the Hubble Space Telescope can see 20 billion light years into space; I think you're off by a factor of three or so.
What is the equation for the travel time to the nearest star at the speed of light?
For example, if a star is at a distance of 5 light-years, it will take 5 years to travel there at the speed of light.
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 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 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 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 far can the speed light can travel?
The speed of light is about 183,000 miles per second, or just under 300,000 kilometers per second. Radio transmissions, which travel at the speed of light, can go from the earth to the moon in under two seconds, but it would take them almost nine minutes to reach the sun. As far as distance, no one has ever theorized that light stops traveling, if unimpaired by a solid substance. It's presumed that it can travel to the known edges of the universe, but it can take it billions of years to get there.
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 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 miles across the universe?
The observable universe is estimated to be about 93 billion light-years in diameter, which is equivalent to roughly 558 sextillion miles. However, it is important to note that the universe may extend beyond the observable limits.
What is the James Webb space telescope going to study?
It is going to replace the Hubble Space Telescope in the year 2018. It will study the edges of the universe, where the light from the creation of the Universe is still in transit to the Earth. So what JWST will do is to look at the past, billions of years ago, when the Universe was only a few hundred million years old. This would help us understand more about the evolution of the Universe.
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 distance of equator of our universe?
universe's equator distance is about 150,000,000,000 light years.
