Astronomy & 7th Grade and Up
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A galaxy is a huge group of stars, dust, gas, and other celestial bodies bound together by gravitational forces. Learn more...
Learn about the life cycle of a star with this helpful diagram.
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!
Spiral galaxies are galaxies with a central, dense area and spiraling arms (which are often sites of star formation).
Stars are classified by their spectra (the elements that they absorb) and their temperature.
Learn about the planetary and atmospheric composition of the sixth planet, Saturn.
There are 12 constellations in the Zodiac, learn about them here!
Learn about the inner planetary composition of the planet, Uranus.
Jupiter has four large moons and dozens of small ones. Galileo first discovered the four largest moons of Jupiter, Io...
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