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What is light year and what speed does light travel?

Updated: 8/20/2019
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11y ago

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A "Light Year" is a measure of distance. It equals approximately

9.5 trillion kilometers or 5.9 trillion miles.

The Speed of Light (C) is:

299,792,458 meters per second

17,987,547,480 meters per minute

1,079,252,848,800 meters per hour

186,282 miles per second (~ 71/2 times around the Earth in one second)

11,176,920 miles per minute

670,615,200 miles per hour

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Q: What is light year and what speed does light travel?
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Related questions

The light year is measured by?

how far u can travel at the speed of light in a year


What is the distant of a light year?

It is the equivalent of how far light can travel at the speed of light in one year.


How long does it take to travel 1 light year?

It will take 1 year, as soon as you and Albert work out how to travel at the speed of light. ;)


How many km can the speed of light travel in one year?

One one year's time, light can travel 9.4605284 × 1012 kilometers.


How long would it take to travel to alpha centauri going at the speed of light?

Approximately 4.3 years. The distance is 4.3 light-years; a light-year is the distance you can travel in a year, at the speed of light. Please note that current technology doesn't allow us to travel anywhere near the speed of light.


What do you need to travel at the speed of light?

There is no way to travel at the speed of light.


How long would it take to go one light year?

Depends on your speed. A light year is the distance light travels in a year. If you traveled slower it would take longer.Depends on the speed you are going.At the speed of light one year.See related question for details of a light yearJust like any other distance, it depends on the speed of travel.-- At the speed of light, radio, x-rays, etc., it takes 1 year.-- At 1 million miles per hour, it takes about 671 years.-- At 60 miles per hour, it takes about 11.2 million years.A light year is the distance that light will travel in one year in a vacuum. The speed of light is 186,000 miles per second. So, light will travel about 5.8 trillion miles in one year. Now, to answer the question. The answer depends on how fast you are traveling. If you were in a space ship travelling 99.9999% the speed of light, it would take you about a year to travel a light year. Now, there is currently no human-made space craft, that we know of, that can travel that fast. The space shuttle travels at about 17,500 miles per hour. In order for the space shuttle to travel one light year, it would take about 38,262 years.


Is it possible to travel at the speed of light in water?

The speed of light in water is less than the speed of light in space. Only light can travel at the speed of light.


What is the approximate time it would take to travel a light year?

if you are going the speed of light, it would take 1 year.


Can a person travel at a speed of light?

No. Nothing with mass can travel at the speed of light.


How much time is a light year at the speed of light?

A light year is a unit of distance; it is the distance lght travel in one year which is 5.8 trillion miles.


How much energy is needed to travel at the speed of light?

It is not possible for any object with any mass to travel at the speed of light. It is possible to travel at 99.9999999999999999999999999999999999999% the speed of light, you could even travel at "99.9 followed by a trillion trillion 9s"% of the speed of light but never quite 100%.According to our current mathematical theories, for an object with any mass to travel at the speed of light it would take infinite energy to attain that speed.