THE WONDERS OF SPACE. Crossword

This printable crossword puzzle on the topic of Astronomy & Space has 10 clues. Answers range from 4 to 12 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

What is in the sky at night?
What do scientist use to see far into the space?
Pluto was a planet, now it's a?
What revolve around Earth?
Mars and Jupitor are closet to the?
The Moon has _____ on it's surface?
A person who is trained to travel in a spacecraft?
A planet whose orbit lies within the asteroid belt?
A place where people and things disappear?
A star that suddenly increases greatly in brightness?