black holes

Black holes are made when a super massive star dies in a super novae. When that happens and the gravity gets to dense it creates a swirling effect which creates a black hole. Sometimes two black holes wander too close and they start to orbit each other. Then they start to speed up and and they get faster and faster until one sucks up the other. The black hole that won gets bigger then if that keeps sucking up other one it could become a super massive black hole. That is how a black hole is made.

galaxies

Galaxies are made up stars, gas, and dust. Usually, galaxies have a super massive black hole in the centre. In that particular area star explosions are frequent the earth and all the living organisms would be fried. our galaxy,the milky way is apart the local group. There are a few big galaxies and a lot of small ones. Including the small and large magellanic clouds. Those are two dwarf galaxies being pulled toward the milky way and the Andromeda galaxy. The big galaxies are called, The Andromeda galaxy, the Triangulum galaxy, and the Milky way. the Andromeda galaxy is speeding toward us at thousands of miles per hour. When the sun has died down and has became a white dwarf, the Andromeda galaxy will slam into us. that is what galaxies are and what other galaxies are near us.