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.
The solid rock layer of the Earth
The molten rock layer of the Earth
The liquid center (mostly make of iron and nickel)
The solid inner layer (mostly made of iron and nickel)
The Earth's twin
This is weak on Mercury
This planet is 58,000,000 km away from the sun
Mercury is most likely made up of dense
Mercury has virtually no
Venus rotates
20% of Venus's atmosphere
Venus's temperature
Only planet other than Earth with frozen ice caps
Percentage of Mars's oxygen
What found evidence of water on mars?