LIGHT YERS

Imagine a highway from the Earth to the Moon. Driving a car with out stoping we will arrive in 160 days. And to the Sun we will arrive in 170 years!
Like you see, the universe is huge and if we use the normal measurement to measure the distances between to space´s bodies, like for exsample kilometres will right huge numbers.That is because the astronomers use different units: the Light Year.
Une light year is the distance that a light lightning go all over a year.
The light is faster than a vehiclel runs more 300,000 kilometres per second. Like this the Sun light only take8 minutes and 20 seconds to arrive to the Earth.