How far is a light-year?

How far is a light-year?

Stars other than our sun are so far distant that astronomers refer to their distances not in terms of kilometers or miles – but in light-years. Light is the fastest-moving stuff in the universe. It travels at an incredible 300,000 kilometers (186,000 miles) per second. That’s very fast. If you could travel at the speed of light, you would be able to circle the Earth’s equator about 7.5 times in just one second!

A light-second is the distance light travels in one second, or 7.5 times the distance around Earth’s equator. A light-year is the distance light travels in one year. How far is that? Multiply the number of seconds in one year by the number of kilometers (or miles) that light travels in one second, and there you have it: one light-year. It’s about 9.5 trillion kilometers (5.88 trillion miles).

Light travels at 186,000 miles per second.
Therefore 60x60x24x365=seconds in a year 31,536,000 x 186,000 = 5,865,696,000,000 miles in a lightyear.

Related Post

The 5 Most Expensive Sodas In The World
views 240
The following list of sodas are either currently on the market, or have already been sold and made history as one of the most expensive soda cans in t...
Jose Mujica the World’s poorest president: Why He’s Poor Will Surpr...
views 211
You might not believe it, but Jose Mujica, president of Uruguay since 2010, is known to be the world’s poorest president. Jose donates more then of 90...
The 10 Most Expensive TVs in the World
views 88
What usually drives up the cost of a TV is the size of the screen, its resolution, its smarts, the available ports, its refresh rate, and display feat...
TOP 10: Countries With The Fastest Internet Speeds
views 45
The world is continually changing, and the needs of the population are mounting with each passing year as people seek to keep in touch, conduct busine...
Floating Streets Umbrellas in Portugal
views 66
Every July, as part of Ágitagueda art festival, hundreds of umbrellas are hung over promenades in the streets of Águeda, a municipality in Portugal. T...

SHARE WHAT YOU THINK