This printable crossword puzzle on the topic of Astronomy & Space has 20 clues. Answers range from 4 to 18 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Regular rising and falling ocean levels
The time at which the sun is directly overhead at the equator causing day and night to be about equal lengths
The spinning of a planet on its axis
When the Earth casts a shadow on the moon, causing the moon to go dark
The motion of a body that travels around another body in space
The imaginary line that passes through the center of a planet from pole to pole
When the Moon casts a shadow on the Earth, causing the sun to go dark
The darkest part of a shadow
The lighter part of a shadow
The region of the earth from the equator to the North Pole
The time of the year in which the longest day occurs
The time of year in which the shortest day occurs
When the tidal range is at is largest and the tides are unusually high and low on the same day
When the tidal range is at its smallest
One of four parts of the year marked by changes in hours of daylight and changes in weather
The times where the Moon, the Earth, and the Sun line up perfectly for an eclipse
The moon is not visible. The side that is facing away from Earth is lit and the side facing Earth is not lit
The moon appears to be completely lit by the sun
The moon appears to be more than half, but not fully, lit by the sun, The lit portion will grow larger every day
The Moon appears to be more than half, but not fully, lit by sunlight, The lit portion will grow smaller every day