Universe Crossword Puzzle
Download and print this "Universe" crossword puzzle, or solve it online directly in your browser. For the printable version, use a pencil or pen to fill in the answers. The completed answers are included, so you can easily check your work when you're finished.
PDF will include puzzle sheet and the answer key.
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QUESTIONS LIST:
- hr diagram : a graph that plots stars organized by luminosity and by their temperature
- star : a sphere made up of extremely hot gases
- nebula : a cloud of gas and dust in outer space
- main sequence : a series of stars types in a band from the upper left (hot bright stars) to the lower right (cool dim stars)
- luminosity : the total amount of luminous energy emitted by a star
- gravity : it is the natural force of attraction that causes to fall toward the earth
- irregular : a galaxy without a distinct shape. among the smallest galaxies. they contain a lot of gas and dust with continuous star formation
- milky way : a spiral shaped galaxy that contains our solar system
- spiral : a galaxy having an elliptical shape, three dimensional with random orbits around its center
- elliptical : a galaxy having an elliptical shape, three dimensional with random orbits around its center
- black hole : a celestial object that has a gravitational collapse, which increases the star's luminosity
- supernova : the explosion of a star, possibly caused by a gravitational collapse, which increases the stars luminosity
- galaxy : a gravitational bound system of stars, separated from similar systems by vast region of empty space
- sun : the start that is the center of our solar system
- universe : all of time & space and its contents includes planets, moons, stars, galaxies, asteroids
