A star is a celestial body that emits light of their own. They are very big in size and yet they appear so small because they are very far away from us. The stars that we see in the sky are thousands of light years away from planet Earth. One light years is the distance travelled by light in one year. One light yea_ 3×10+465+24+60m-9.46+10m or 9.46+10km.

Our sun is also a star. In fact the sun is also a star .it fact the sun is the closest star from our planet Earth other stars are much bigger in size than the sun. The nearest star to our planet Earth other stars are centauri it is 4.22 light years away this means that the light emitted by this star takes approximately 4.3 years to reach out planet Earth.