This printable crossword puzzle on the topic of Astronomy & Space has 16 clues. Answers range from 4 to 14 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
center part, hottest, where nuclear fusion occurs
hydrogen atoms smashing together to create helium atoms
very tiny, makes up matter
has mass and volume
mass divided by volume
how much stuff a solid, liquid, or gas has
takes up space
middle layer, holding layer for sun's energy
outer layer, releases sun's energy at the surface
inner layer of sun's atmosphere, visible
outer layer of sun's atmosphere, appears white during solar eclipse
middle layer of sun's atmosphere, appears reddish during solar eclipse
cool areas of gas on sun's surface, black
loops of gas on sun's surface, near sun spots
eruption of energy when sun spots and prominences meet up
seen as the Northern Lights on Earth