The Big Bang Crossword

This printable crossword puzzle on the topic of Astronomy & Space has 18 clues. Answers range from 4 to 25 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

The three main components for a galaxy are a bulge, disk, and halo
A group of stars that are gravitationally bound
Consists mostly of empty space
Does not have any internal structures
The first inner planet
The second inner planet
Rocky, Earth-like
Gas giants
Large space rocks
Frozen gases and tiny dust particles
Balls of gases that produce light and heat
Streaks of light caused by burning space rock
Fuzzy cloud of gas
Does not have a distinct shape contains many young stars and have intense star formation
Leftover thermal energy from the big bang
Objects moving away from the Milky Way give off a wave of light
If a star is ______, then it is moving away
Matter that doesn't give off electromagnetic radition