Outer space Crossword

A large celestial body composed of gas and emits light
The sun and all of the planets and other bodies that travel around it
A relatively late spherical body that orbits a star
A collection of stars,dust, and gas bound together by gravity
A large cloud of gas and dust in interstellar space; a region in space where stars are born
A small, hot, dim star that is the leftover center of an old sunlike star
A star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons
The distance that light travels in one year
Space and all the matter and energy in it
The brightness of a star as seen from Earth
The actual brightness of an object such as a star
A measure of how bright a star would be if it were seen from a standard distance
A gigantic explosion in which a massive star collapses and throws its outer layers into space
Hertzsprung-Russell diagram
The location on the HR diagram where most stars lie.