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Mr V U2 Solar System

Solar System and Universe

TermDefinition
SOLAR SYSTEM THE SYSTEM CONSISTING OF THE SUN AND THE PLANETS AND OTHER OBJECTS THAT REVOLVE AROUND IT.
ASTRONOMICAL UNIT A UNIT OF DISTANCE EQUAL TO THE AVERAGE DISTANCE BETWEEN THE EARTH AND THE SUN, ABOUT 150 MILLION KILOMETERS.
SUN A LARGE, GASEOUS BODY AT THE CENTER OF THE SOLAR SYSTEM.
PLANET AN OBJECT THAT ORBITS A STAR, IS LARGE ENOUGH TO BECOME ROUNDED BY ITS OWN GRAVITY, AND HAS CLEARED THE AREA OF ITS ORBIT.
MOON A NATURAL SATELLITE THAT ORBITS A PLANET.
ASTEROID ONE OF THE ROCKY OBJECTS REVOLVING AROUND THE SUN THAT ARE TOO SMALL AND NUMEROUS TO BE CONSIDERED A PLANET.
METEOROIDS A CHUNK OF ROCK OR ICE IN SPACE, GENERALLY SMALLER THAN AN ASTEROID.
COMETS A LOOSE COLLECTION OF ICE AND DUST THAT ORBITS THE SUN, TYPICALLY IN A LONG, NARROW ORBIT.
ELECTROMAGNETIC RADIATION THE ENERGY TRANSFERRED THROUGH SPACE BY ELECTROMAGNETIC WAVES.
VISIBLE LIGHT ELECTROMAGNETIC RADIATION THAT CAN BE SEEN WITH THE UNAIDED EYE.
SPECTRUM THE RANGE OF WAVELENGTHS OF ELECTROMAGNETIC WAVES.
WAVELENGTH THE DISTANCE BETWEEN TWO CORRESPONDING PARTS OF A WAVE, SUCH AS THE DISTANCE BETWEEN TWO CRESTS.
TELESCOPE AN OPTICAL INSTRUMENT THAT FORMS ENLARGED IMAGES OF DISTANT OBJECTS.
NEBULA A LARGE CLOUD OF GAS AND DUST IN SPACE.
PROTOSTAR A CONTRACTING CLOUD OF GAS AND DUST WITH ENOUGH MASS TO FORM A STAR.
WHITE DWARF THE BLUE-WHITE HOT CORE OF A STAR THAT IS LEFT BEHIND AFTER ITS OUTER LAYERS HAVE EXPANDED AND DRIFTED OUT INTO SPACE.
SUPERNOVA THE BRILLIANT EXPLOSION OF A DYING SUPERGIANT STAR.
APPARENT BRIGHTNESS THE BRIGHTNESS OF A STAR AS SEEN FROM EARTH.
ABSOLUTE BRIGHTNESS THE BRIGHTNESS A STAR WOULD HAVE IF IT WERE AT A STANDARD DISTANCE FROM EARTH.
GALAXY A HUGE GROUP OF SINGLE STARS, STAR SYSTEMS, STAR CLUSTERS, DUST, AND GAS BOUND TOGETHER BY GRAVITY.
UNIVERSE ALL OF SPACE AND EVERYTHING IN IT.
LIGHT-YEAR THE DISTANCE THAT LIGHT TRAVELS IN ONE YEAR; ABOUT 9.46 TRILLION KILOMETERS.
BIG BANG THE INTITIAL EXPLOSION THAT RESULTED IN THE FORMATION AND EXPANSION OF THE UNIVERSE.
Created by: dougteach65
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