This printable crossword puzzle on the topic of Astronomy & Space has 10 clues. Answers range from 3 to 10 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Mercury is closest of all the planets to this star.
Venus, Mercury, Mars, Saturn, and this planet make up what are known as "Classical Planets".
This is the smallest planet.
The ancient Greeks mistakenly called Mercury this in the morning.
The ancient Greeks mistakenly called Mercury this in the evening.
This civilization recorded the earliest observations of Mercury 3000 years ago.
Mercury's surface is similar in appearance to this heavenly body.
Mercury does not have a consistent "this" because it is too hot and small.
He is the Roman god of trade.
Mercury rotates on "this" 3 times for every 2 revolutions of the sun.