Difference between quasars, pulsars, and black holes.

Quasars: The word quasar is short for "quasi-stellar radio source", which means star-like emitters of radio waves. Quasars also emit visible light, ultraviolet rays, infrared waves, X-rays, and gamma-rays. Quasars give off more energy than 100 normal galaxies combined. They are believed to be the most distant object detected in the universe to date. The amount of energy they give off can be up to a trillion times brighter than the sun! Quasars are located in black holes in the center of the galaxy. They are so bright their light drowns out the light from other stars. A quasar is approximately 1 kiloparsec in width and most of them are larger than our solar system.
Pulsars: A pulsar is formed when a massive star collapses and exhausts its supply of fuel. It then creates a giant explosion known as a supernova. A pulsar is a rapidly spinning neutron star which also has a powerful magnetic field. The magnetic field causes the neutron star to emit strong radio waves and radioactive particles from its north and south poles. Pulsars appear to be blinking as their rotating poles sweep past the Earth. The pulse rate depends on the size and mass of the neutron star. If a pulsar has a binary companion, the pulsar may begin to pick up matter from this companion. This can cause the pulsar to rotate even faster-up to well over one hundred times a second!
Black Hole: A black hole is a collapsed star. Its gravity is so strong that its escape velocity exceeds the speed of light. Since nothing is known to exceed the speed of light, nothing can escape from a black hole. Jets of hot gas are occasionally found streaming out of the region surrounding a black hole. There is an imaginary sphere around the black hole; it is known as the event horizon. Once matter reaches the inside of the event horizon, it is crushed into a single point and reaches infinite destiny-meaning it can never escape. There are three types of black holes: miniature black holes, supermassive black holes, and stellar black holes.