NEBULAS-Nebulas are clouds of gas and space dust. These particles can clump together to form stars and planets. These can be formed by supernovas. To form objects the matter clumps together because of the gravitational pull of the objects. After awhile it will start to form stellar objects like planets and stars.
NEUTRON STARS-A neutron star is caused by a supernova. For this to happen the star must have a high mass(weight) level. The matter from the explosion will come back on itself to create a dense ball of neutrons. A star, though can go through one last stage.
QUASARS-Quasars are very active black holes that are one of the brightest objects in the universe. A quasar is so bright because it super-accelerates matter around it and causes the matter to get very hot and bright.
BLACK HOLES-To form a black hole the star must be very heavy indeed. If a neutron is to heavy it will collapse on itself to form a hole in space-time known as a black hole. It has a gravitational pull so great that light can not even escape.
WORMHOLES-Wormholes are theoretical object formed by black holes. It is supposed to be able to link to places through hyper-space. If these were real they would provide a shortcut to other parts of the universe.