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OUR EARTH AND SKY~ STAR SYSTEM~IS MADE OF ONE HUNDRED THOUSAND MILLION OF STARS.WHAT ARE YOU UNDERSTAND ABOUT GALAXY?is the any star system in the universe.____dust and gas are called INTERSTELLAR MATERIAL,are make between 10% and 20% of our galaxy.~also their is something called NEBULAE{singular:NEBULA},it"s came from Latin word which mean~"cloud"."WHAT IS GREAT NEBULA IN ORION?~is the cloudy patch you see above bottom star in Orion"s sword.N.B patch~black sport area of silk. also dust also occur as gas do.DARK NEBULAE~~when the dark cloud hide the light of stairs behind them and it appear as dark cloud.REFLECTION NEBULAE~when the light from star reflect from neigh boring dust particles.LIGHT YEAR~~this is the distance that a light travel in one year.~the best known of galaxy in local group is ANDROMEDA GALAXY.Astronomers divide the galaxy into several group:1:ELLIPTICAL 2:IRREGULAR 3:DWARF ~put this in your mind to remember this several group:DEI WHERE BY D~STAND FOR~DWARF E~STAND FOR~ELLIPTICAL, AND I~STAND FOR IRREGULAR. THAT GOOD MY FRIEND~SOME THINK FOR BREAKFAST WHILE OTHER THINK FOR SEARCH.by e....... |
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