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Details Title: ASTRONOMY 101 Description: CHAPTER 1 Total Flash Cards: 12 Created: 08/23/2007 17:10:36	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term SCIENTIFIC NOTATION Definition A SIMPLE WAY TO WRITE NUMBERS WITHOUT WRITING A GREAT MANY ZEROS. Term FIELD OF VIEW Definition WITHIN THE UNIVERSE THAT IS 100 TIMES WIDER THAN THE PRECEDING PICTURE. IT HAS INCREASED IN SIZE BY A FACTOR OF 100. Term SOLAR SYSTEM Definition CONSISTS OF THE SUN, ITS FAMILY OF PLANETS, AND SOME SMALLER BODIES, SUCH AS MOONS, ASTEROIDS, AND COMETS. Term PLANET Definition SMALL, NONLUMINOUS BODY THAT SHINES BY REFLECTING SUNGLIGHT. Term STAR Definition A SELF-LUMINOUS BALL OF HOT GAS THAT GENERATES ITS OWN ENERGY. Term ASTRONOMICAL UNIT (AU) Definition THE AVERAGE DISTANCE FROM EARTH TO THE SUN. Term LIGHT YEAR (ly) Definition THE DISTANCE THAT LIGHT TRAVELS IN 1 YEAR. Term GALAXY Definition A GREAT CLOUD OF STARS, GAS, AND DUST BOUND TOGETHER BY THE COMBINED GRAVITY OF ALL THE MATTER. Term MILKY WAY Definition A GREAT CLOUDY BAND OF STARS RINGING THE SKY. Term MILKY WAY GALAXY Definition OUR GALAXY'S NAME Term SPIRAL ARMS Definition OUR GALAXY CONTAINS OVER 100 BILLION STARS WINDING OUTWARD THROUGH THE DISK. Term SUPERCLUSTER Definition THESE ARE LINKED TO FORM LONG FILAMENTS AND WALLS OUTLINING VOIDS THAT SEEM NEARLY EMPTY OF GALAXIES. THESE ARE THE LARGEST STRUCTURE IN THE UNIVERSE.