Planets in Our Solar System Crossword

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

Spins in the opposite direction of all planets?
Smallest Planet ?
Has 27 moons?
Fastest rotating planet?
Least dense planet?
35 miles from earth?
Venus' mountain's name?
Mars has ___ number of moons.
How many Earths could you fit in Jupiter's red spot?
Venus is the ______ planet.
One day on Mercury takes 87____ days.
Second largest planet?
Mars is 35 _____ miles from earth.
One day around Uranus takes 17 ___.
Which planet is considered Venus' 'sister planet'?