Stars & 7th Grade and Up
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Stars are classified by their spectra (the elements that they absorb) and their temperature.
Learn about how a star dies in this Astronomy information page.
Learn about nuclear fusion, an atomic reaction that fuels stars as they act like nuclear reactors!
Learn about the life cycle of a star with this helpful diagram.
Spiral galaxies are galaxies with a central, dense area and spiraling arms (which are often sites of star formation).
A galaxy is a huge group of stars, dust, gas, and other celestial bodies bound together by gravitational forces. Learn more...
There are 12 constellations in the Zodiac, learn about them here!
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