Physics crossword puzzle

This printable crossword puzzle on the topic of Astronomy & Space has 10 clues. Answers range from 3 to 14 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

A small body in orbit around the planet
A glowing ball of gas held together by its own gravity
A spiral galaxy in which the sun resides
small galaxy containing a few million stars
changes in average temperature and length of day that result from the tilt of Earths axis
the sun and all the planets that orbit it
The sun is the largest object in the solar system
A black hole is a place in space where gravity pulls so much that even light can not get out
Gravitationally bound collection of a large number of stars
an eclipse in which the sun is obscured by the moon