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Classroom Activities Interactive Puzzles Astronomy Quizzes Classroom Activities Solar System Tutorial Questions and Answers Fun Things Astronomy crafts Coloring pages Your age on other planets Your weight on other planets Interactive Puzzles The Solar System All About the Solar System The Sun Origin of our Solar System The Ecliptic Where is our Solar System? Exploring our Solar System The Kuiper Belt Solar System Extremes Solar System Tutorial Solar System Calendar to Print The Sun The Sun    •Mass, Size    •Solar Structure    •Solar Eclipses    •Sunspots    •Flares, Prominences, and Solar Wind    •Solar Rotation    •Birth of the Sun    •Death of the Sun The Moon Moon    •Craters    •Inside the Moon    •Lunar Eclipses    •Map    •Phases    •Tides Small Bodies Asteroids    •Near-Earth Asteroids    •Dinosaurs and Asteroids    •List of Asteroids    •Composition of Asteroids Comets    •Crossing Orbits: Meteor Showers    •Comet Origins    •Major Comets Meteoroids    •Meteors    •Meteor Showers    •Meteorites Stars Stars    •Life Cycle    •Nuclear Fusion    •Star Types    •Brightest Stars    •Closest Stars    •Galaxies    •Nebulae    •Other Solar Systems    •Constellations    •Zodiac    •Zodiac Calendar Astronomy Dictionary Illustrated Astronomy Dictionary    •over 1,000 terms defined. Site Index Site Index