The Big Bang Theory Cross-Word Puzzle Crossword

All existing matter and space considered as a whole
Remnant of a star that is so dense that nothing, not even light, can escape its gravity field.
The remaining hot core of a star after its outer layers have expanded and drifted into space- remains of a red giant.
The study of the structure of the universe.
An immense cloud of gas (mainly hydrogen) and dust interstellar space.
Galaxies are moving away from each other (law).
A star that explodes and becomes extremely luminous in the process.
Huge stellar explosion involving the destruction of a massive star- results in tremendous brightness.
The distance that light travels in a vacuum of one year.
A shift in the spectra of distant galaxies towards longer wavelengths, suggesting they are moving away from the observer.