This printable crossword puzzle on the topic of Astronomy & Space has 12 clues. Answers range from 1 to 26 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
How long does it take a star to form from scratch?
What is the most common element in the interstellar medium?
What type of cluster did the Sun form in?
What cluster consists of hundreds of thousands of stars?
Which type of star is the most commonly seen in the night sky?
What keeps a white dwarf from collapsing under its own weight?
How much hydrogen is turned into helium each second in the Sun?
How much hydrogen is turned into energy during nuclear fusion inside of the Sun?
How many hydrogen nuclei are turned into helium nuclei during nuclear fusion?
90% of the Sun's energy from nuclear fusion is generated via what process?
How old is the Sun?
What force holds up a star against its own weight?