Astronomer Cross Word

This printable crossword puzzle on the topic of Astronomy & Space has 10 clues. Answers range from 9 to 19 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

measured the altitude of the noontime run at Alexandria at its maximum on June 21
Proved the earth is spherical
Heliocentric; results were not accurate
Organized astronomical objects scale to define the brightness of stars
Discovered the sun shine light on the moon because the moon did not have light on its own
Cosmological theories of the infinite universe
Spectral classifications of all stars
Classified types of stars by their temp
Discovered Uranus
said the universe expands