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02.03 Distances in Space

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Angie Gutierrez

on 20 November 2013

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Transcript of 02.03 Distances in Space

02.03 Distances in Space
By:Angie Gutierrez

What is a Leap Year ?
A light year is the distance that light can travel in one year. So if an object is one light year away, it will take light one year to get there.
Light Years
Because light is so fast, it is used to measure distances in space.

A light year is the distance that light can travel in one year. So if an object is one light year away, it will take light one year to get there.
Light years are used to measure distances in space because their large size allows us to talk about vast distances using smaller numbers.
Have you ever noticed that during a thunderstorm you can see the lightning a long time before you hear the thunder? The reason for this is light travels 800,000 times faster than sound. In fact, light is the fastest thing in the universe that we know of.


It takes light 4.2 years to travel from Proxima Centauri to the Earth. This means that when you look up into the night sky and see Proxima Centauri you are looking at light that is 4.2 years old. If Proxima Centauri were to explode it would take 4.2 years for us to know about it.
Proxima Centauri
Did you know ?
Light Year Chart
The Moon-238,857 miles
The Sun- 0.0000016 light years 92,900,000
Pluto -0.0005 light years 3,067,548,000 miles
Proxima Centauri- 4.2 light years 24,690,000,000,000 miles
The Milky way -100,000 light years 587,900,000,000,000,000 miles
Andromeda Galaxy -2,500,000 light years 14,697,500,000,000,000,000 miles
Edge of the Universe- 20,000,000,000 light years 117,580,000,000,000,000,000,000 miles


This chart shows the distance in light years ,and distance in miles
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