Orion+Nebula+4B

[|**Orion Nebula**]- IS A GLOWIN CLOUD OF GAS N DUST
-THE ORION NEBULA IS VISIBLE WIT THE NAKED EYE. -THE NEBULA'S GLOWIN GAS SURROUNDS HOT STARS AT THE EDGE OF A MOLECULAR CLOUD, ONLY 1500 LIGHT YEARS AWAY. -[[image:http://apod.nasa.gov/apod/image/0109/barnard68_vlt.jpg caption="See Explanation. Clicking on the picture will download the largest version available." link="http://apod.nasa.gov/apod/image/0109/barnard68_vlt_big.jpg"]]

-THIS IS AN EXAMPLE OF A MOLECULAR CLOUD -A LIGHT YEAR IS U UNIT OF DISTANCE. LIGHT MOVES IS ABOUT 300,000 km EACH SECOND. -ORION NEBULA SURROUNDS THE STARS "THETA HUNTERS SWORD BELOW ORION'S BELT. -THE ENERGY TO KEEP THE NEBULA GLOWIN COMES FROM THE VERY HOT YOUNG STARS FROM A FORMATION CALLED THE TRAPEZION. -THE TRAPEZION CLUSTER- THE CENTER OF THE CUSTER SHOWING THE FOUR MASSIVE STARS, A NUMBER OF EVAPORATING PROTO-PLANETARY DISKS. -SIZE: 66 BY 60 arc minutes -MASS: 300 SOLAR MASSES -THE BRIGHTEST PROTIONS ARE "HILLS" ON THE SURFACE OF THE NEBULA. -THE LONG BRIGHT BAR IS WHERE EARTH OBSERVERS LOOK ALONG A "WALL". -
 * A TRAPEZIUM CLUSTER*