Earth Science Astronomy Standards Crossword

a large group of stars,dust,and gas
a cloud of gas and dust in outer space
a group of stars that are close together relative to surrounding stars
a very luminous object that produces energy at a high rate
a rapidly spinning neutron star that emits pulses of radio and optical energy
a galaxy in which the stars and our solar system are in one or more spiral arms
a type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless brightness profile
a galaxy full of dim stars
a gigantic explosion in which it was caused by a massive star
a very large and red star of high luminosity and low surface temperature
a small dense star that is typically the size of a planet
the theory that the universe began with a huge explosion and left radiation
a spiral galaxy that our solar system is located in
a process when two or more low-mass nuclei join together to form or fuse another nucleus
a series of star types to which most stars belong to