Structure of the Universe Crossword

This printable crossword puzzle on the topic of Astronomy & Space has 10 clues. Answers range from 5 to 11 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

This is an area where little matter exists.
The four inner planets are called __________ planets
The Earth is located in the ________________ Galaxy
Systems of ice, rock and dust orbiting a planet.
Outer planets are known as ___________ giants.
This is produced in the core by the process of nuclear fusion.
The milky ways is shaped in a ______________ pattern.
Distance in space is measured in __________ ___________.
Stars are made of helium and ______________.
The brightest planet in our solar system.