The+sun

the sun The sun is a medium sized star. Some other stars in space are bigger than the sun. They seem so small because they are so far away from us. The nearest star is four light years away from us. In about four billion years, the sun will become a red giant. When the sun is a red giant it will destroy Mecury and Venus. Earth will be burnt. Some stars are massive enough to become a black hole. But the sun is not. If a star is two or one mass of the sun it will become a neutron star. A neutron star would weigh more than the sun. If a star is three times the mass of the sun it would collapes beyond a neutron star and turn into a black hole. The gravitatian pull of a black hole is so strong that not even light can escape. Astronomers can't see black holes but they can locate them.