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Unformatted text preview: Emission nebulae , or H II regions , are glowing, ionized clouds of gas and dust grains . Emission nebulae are powered by ultraviolet light that they absorb from nearby hot stars. Recombination the process in which free electrons and free protons combine to form Hydrogen also generates light in the visible spectrum. Reflection nebula e are produced when starlight is reflected from dust grains in the interstellar medium, producing a characteristic bluish glow. Interstellar Extinction the process in which the intensity of light from distance stars is reduced as it passes through material in interstellar space. Interstellar Reddening...
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.
- Fall '10