Here is a brief gossary about 3 things we learned.
Black holes: When a star collapses inward. It dies and gets smaller and smaller. Here is a great link that will allow you to travel to a black hole: The Hubble Telescope
Supernova: When a star begins to shrink, it produces a huge amout of mass actually generating so much heat that the star explodes.
Nebula: a "footprint" of a supernova. When a star explodes, it leaves behind a cloud of dust and debris.
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