Details Title: Chapter 14 Description: Our Galaxy Total Flash Cards: 9 Created: 04/21/2008 12:05:11		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Physics Flashcards
Cards in this set: Term Spiral Density Wave Definition the theory that the massive black hole in our galaxy sens compression wave thru the galaxy and creates new spiral arms Term Interstellar Medium Definition material between stars gas and dust Term 21 cm radiation Definition hydrogen spin flip radio waves Term Dark Matter Definition 90% of matter in galaxy Term Cosmic rays Definition particles shot out by supernova Term Dust grains Definition carbon and silicate dust between stars Term Emission nebula Definition heated glowing gasses Term Reflection nebula Definition bluish from dust reflection Term Molecular Clouds Definition prime ares for formation