Big Bang Theory Crossword

This printable crossword puzzle on the topic of Astronomy & Space has 10 clues. Answers range from 3 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

theory of the origin of the universe
leftover radiation from the big bang
all matter
these combined, expanded, and cooled to form objects in the universe
range of frequencies of electromagnetic radiation
increase in wavelength
decrease in wavelength
73% of visible particles universe
25% of visible particles universe
other than hydrogen and helium, first present element in the universe