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WHAT IS A LIGHT YEAR?

Published on Jul 10, 2022

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1.

WHAT IS A LIGHT YEAR?

Photo by Billy Huynh
2.

It is NOT a measure of TIME!

It's a measure of distance.
3.

Light travels at
300,000
km per second.

Photo by Clyde He
4.

That's so fast -
light could circle the Earth
7 1/2 times in one second!

Photo by zeitgeistassociates
5.

A light year is the distance light travels
in one year.

Photo by Casey Horner
6.

That's 9.5 trillion km

Photo by Maarten Verstraete
7.

Why use light years?

Photo by JusDaFax
8.

The star closest to our solar system is 40,208,000,000,000 km away.

Photo by Andy Holmes
9.

That's about 4.5 light years - a much easier
number to use.

Photo by Andy Holmes

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