The Planets Crossword

This printable crossword puzzle on the topic of Astronomy & Space has 18 clues. Answers range from 3 to 25 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

I am the Smallest Planet
I am one of the Twin Planets
I am the other twin Planet
What is Mars called
What is Venus named after
what is Mercury named after
what is Earth named after
What is Mars named after
70% of my surface is water
all of the water on Mars is
what is the first layer of the planets
what is the second layer of the planets
what is in the last layer of the planets
2 years on earth is 1 day on
what are terrestrial plants made of
I am the Largest planet
11 years on earth is one day on
what is Jupiter mostly made of