Did You Know?
Light can travel around the Earth 7.5 times in one second!
How Light Moves
Light moves super fast in space.
Why We Use Light-years
We use light-years to talk about stars.
What lightyear Does
It shows how far stars are.
It helps us learn about space.
It makes space feel less big.
It helps us find new planets.
It shows how fast light is.
It helps us think about time and space.
More About lightyear
A long time ago, we did not know how big space was. Then, smart people found out how fast light is. They used this to make the light-year. Now, we can say how far away stars are.
Knowing about light-years helps us see how big the sky is. It makes us think about how small we are. It helps us dream about space trips!
In the future, we may find new stars and planets. We will use light-years to tell how far they are. This will help us learn more about space!
