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The distance that light travells in one year. Since light travels at 3000,000 km/sec, or 186,000 miles/sec, that's a very long way! The distance that light travells in one year. Since light travels at 3000,000 km/sec, or 186,000 miles/sec, that's a very long way!
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoDistances between stars and galaxies are so big, that they are commonly not expressed in kilometers, but in light-years. Actually, this is the measure used in popular astronomy; the astronomer often prefers parsecs.
A light year is the distance light travels in a year. Note that it is a measure of distance, not of time.
A parsec is about 3.26 light years.
Here are some typical distances:
Sun: 8 light-minutes
Toliman (the closest star, after the Sun): 4.3 light years
Sirius (the star with the greatest apparent brightness): 8.6 light years
Diameter of our galaxy: about 100,000 light years
Distance to Andromeda galaxy: about 2.5 million light years
Radius of the observable universe: over 40 billion light years.
Distances between stars and galaxies are so big, that they are commonly not expressed in kilometers, but in light-years. Actually, this is the measure used in popular astronomy; the astronomer often prefers parsecs.
A light year is the distance light travels in a year. Note that it is a measure of distance, not of time.
A parsec is about 3.26 light years.
Here are some typical distances:
Sun: 8 light-minutes
Toliman (the closest star, after the Sun): 4.3 light years
Sirius (the star with the greatest apparent brightness): 8.6 light years
Diameter of our galaxy: about 100,000 light years
Distance to Andromeda galaxy: about 2.5 million light years
Radius of the observable universe: over 40 billion light years.
Distances between stars and galaxies are so big, that they are commonly not expressed in kilometers, but in light-years. Actually, this is the measure used in popular astronomy; the astronomer often prefers parsecs.
A light year is the distance light travels in a year. Note that it is a measure of distance, not of time.
A parsec is about 3.26 light years.
Here are some typical distances:
Sun: 8 light-minutes
Toliman (the closest star, after the Sun): 4.3 light years
Sirius (the star with the greatest apparent brightness): 8.6 light years
Diameter of our galaxy: about 100,000 light years
Distance to Andromeda galaxy: about 2.5 million light years
Radius of the observable universe: over 40 billion light years.
Distances between stars and galaxies are so big, that they are commonly not expressed in kilometers, but in light-years. Actually, this is the measure used in popular astronomy; the astronomer often prefers parsecs.
A light year is the distance light travels in a year. Note that it is a measure of distance, not of time.
A parsec is about 3.26 light years.
Here are some typical distances:
Sun: 8 light-minutes
Toliman (the closest star, after the Sun): 4.3 light years
Sirius (the star with the greatest apparent brightness): 8.6 light years
Diameter of our galaxy: about 100,000 light years
Distance to Andromeda galaxy: about 2.5 million light years
Radius of the observable universe: over 40 billion light years.
Wiki User
∙ 15y agoOne light year is the distance that light travels in one year. The speed of light is 299,792.458 kilometers per second, or 186,282.397 miles per second.
One year is 60 * 60 * 24 * 365.25 seconds, or 31,557,600 seconds.
So multiply the number of seconds per year times the speed of light, and you get the distance that light travels in one year.
That's 9,460,730,472,580 km or 5,878,625,371,567 miles.
That's 9.46 TRILLION km or 5.88 TRILLION miles.
Wiki User
∙ 14y agoDistances between stars and galaxies are so big, that they are commonly not expressed in kilometers, but in light-years. Actually, this is the measure used in popular astronomy; the astronomer often prefers parsecs.
A light year is the distance light travels in a year. Note that it is a measure of distance, not of time.
A parsec is about 3.26 light years.
Here are some typical distances:
Sun: 8 light-minutes
Toliman (the closest star, after the Sun): 4.3 light years
Sirius (the star with the greatest apparent brightness): 8.6 light years
Diameter of our galaxy: about 100,000 light years
Distance to Andromeda galaxy: about 2.5 million light years
Radius of the observable universe: over 40 billion light years.
Wiki User
∙ 14y agoExactly 9,460,730,472,580.8 kilometers, about 10 trillion kilometers
Wiki User
∙ 13y ago1 light-year is a distance.
-- the distance light travels in one year, in vacuum
-- 5,878,700,000,000 miles (rounded)
Wiki User
∙ 13y agoTwo light years is a distance of 11.72 trillion miles.
Wiki User
∙ 13y ago. . . 5.86 trillion miles.
Wiki User
∙ 11y agoDistance
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Why is light years used as a unit of the universe?
Because the universe is so large, they need something like light to at least reach large amounts of distance.
What is the observable universe?
The observable Universe is the part of the Universe we can see from Earth because the light from all the objects in it has had enough time to reach us. Light from outside the observable Universe has yet to reach Earth. The reason we can only see part of the Universe is because of the limited speed of light, and the expansion of the Universe, which is faster than that speed. According to Einstein, nothing in the Universe can move faster than light, but nothing stops the expansion of space from moving faster than light. This results in a large part of the Universe being completely invisible to us.
How do astronomers locate other stars trillion light years away?
They can't. The universe is only about 13 billion years old. If there are galaxies a trillion light years away their light has not reached us yet and due to the expansion of the universe, never will. At the edge of what we call the observable universe we cannot make out individual stars, but we can detect galaxies using infrared telescopes.
What is the furthest you can be from Mars?
At furthest reach of the Universe about 46 billion light years away.
What happens when you reach the edge of the universe?
The Universe is approximately 14.6 billion light years across (radius), which gives a total of around 30 billion light years from edge to edge. The Universe came to exIstence 14.6 billion years ago and has been expanding ever since. The expansion process occured very rapidly and exponentially, resulting in expansion close to the speed of light, 3 * 10^8 meters per second. Therefore, the edge of the Universe, from the center, would be around 14.6 billion light years away, theoretically. It turns out that these theoretical calculations are accurate, as astronomers have recently detected the light from stars around 14 billion light years away. As the Universe ages, it will expand even more quickly due to the effects of dark energy.
How large is the known universe?
The observable Universe has a diameter estimated at 93 billion light-years.
Why is light years used as a unit of the universe?
Because the universe is so large, they need something like light to at least reach large amounts of distance.
The universe is so large that astronomers measure distance between stars instead of kilometers?
light-years, parsecs, and megaparsecs
Whats the biggest struture in the universe?
Astronomers have found a mind-bogglingly large structure so big it takes light 10 billion years to traverse in a distant part of the universe.
What is the estimated number of large galaxies since there are 100 billion galaxies in the universe?
If you counted 1 galaxy per second, it would take ~3200 years to count all 100 billion galaxies in the universe.
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.
what is the distance of equator of our universe?
universe's equator distance is about 150,000,000,000 light years.
How large is everything in the universe?
Everything in the universe have different size. The smallest thing ever is the photon particle, and it is so small that nobody has been able to find it's exact size. The greatest thing in the universe is the great wall- a great sheet of galaxies which is 500 million light years long and 16 million light years thick.
How large is our galaxy in light years?
100,000 light years
How are the distances in the universe measures?
In 'light years' or in 'scientific notation'
What is the extent of your universe?
My universe is believed to have a radius of approx 47 billion light years. How big is yours?
How old is the origin of Universe?
13.7 billion years or 13,700,000,000 years. Answer2: The Universe may be immortal and have no "age". The size of the universe is such that it would take 16.7 billion years for light to traverse its radius.
