Details Title: Astro 3 Description: final exam Total Flash Cards: 11 Created: 12/08/2008 21:13:11		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 Astronomy Flashcards
Cards in this set: Term solar system Definition sun, its family of planets, asteroids, comets etc Term planets Definition small luminous bodies that shine by reflecting sunlight Term Astronomical Unit (AU) Definition average distance from the earth to the sun Term light year (ly) Definition the distance light travels in one year Term galaxy Definition great cloud of stars, gas, and dust bound together by gravity of all the matter Term what to stars form from? Definition dust and gas passing through the spiral arms of a galaxy Term how many constellations are there? what do they represent? Definition 88, sections of the sky Term asterisms Definition less formally defined groups (big dipper) Term what is assigned to stars in the order of brightness? Definition greek letters; alpha Canis Major Term magnitude scale Definition measure the brightness of stars, brightest are first magnitude. Term apparent visual magnitudes Definition describing how a star's brightness looks with the naked eye, system of magnitude scale