Introduction to Nebulas

Dark cloud of dust which is only visible because it absorbs the light of stars behind it. <~ Your definition for competition

You can hit stop at 3:15 Reflection Nebula Definition you need to know: A cloud of gas and dust that shines by reflecting the light of nearby stars.   Emission Nebula Definition you need to know: Glowing clouds of interstellar gas has been excited by a nearby energy source.    Magnets.... have a North Pole and A South Pole, a Positive and a Negative. This is because of things called ions. When you steal ions away it changes the way they work. An Emission Nebula has had these ions taken away making it so the gas gets "crazy" and moves away or toward certain things.

Outer layers of gas from a dying star which is puffed out into space. It's central star is a white dwarf. From a distance it looks like a dying planet.

Unlike a planetary nebula, Supernova Nebulas are made from from the death of MASSIVE STARS. Not normal sized stars. Normal sized stars explode into planetary nebulas. MASSIVE HUGE STARS that are 10-20x bigger than our sun explode and die as Supernova Nebulas or Remanent Nebulas.