Zoom Astronomy is a comprehensive on-line site about space and astronomy. It is designed for people of all ages and levels of comprehension. It has an easy-to-use structure that allows readers to start at a basic level on each topic and then to progress to much more advanced information as desired, simply by clicking on links.

Click on an underlined topic to go there.
If you are looking for information about a topic not listed here, try the illustrated Astronomy Dictionary.

The Planets (including the Dwarf Planet Pluto) Mercury    •Mercury Map    •Inside Mercury    •Length of Day, Year Venus    •Inside Venus    •Atmosphere, Clouds    •Spacecraft Visits The Earth    •Continental Drift    •Inside the Earth    •How Fast is Earth Moving?    •How is its Mass Determined?    •Oceans and Why are They Salty?    •Water Cycle    •Atmosphere    •Greenhouse Effect    •Why is the Sky Blue?    •Magnetosphere    •Seasons    •The Moon Mars    •Moons    •Spacecraft Missions    •Statistics Jupiter    •Atmosphere, Composition    •Great Red Spot    •Belts and Zones    •Rings    •Moons    •Statistics Saturn     •Inside Saturn     •Rings     •Moons Uranus    •Seasons, Axis Tilt    •Atmosphere, Composition    •Rings    •Moons Neptune    •Inside Neptune    •Rings    •Atmosphere , Storms    •Moons Pluto (a dwarf planet) Miscellaneous Topics Astronaut Records Astronauts Astronomers Astronomical Unit Astronomy Glossary AU Black Holes Craters Dogs in Space Eccentricity Ecliptic First Dinosaur in Space Geological Time Chart Geological Time Chart, Short How Fast is Earth Moving? Hydrologic Cycle Inclination of Orbits Kuiper Belt Milky Way Orbital Eccentricity Orbital Inclination Phases of Matter Plate Tectonics Questions and Answers Radio-isotope Analysis Sedimentary Rock Space Exploration Spectroscopy Water Cycle Why are the Oceans Salty? Why is the Sky Blue?

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 Astronomy Dictionary Illustrated Astronomy Dictionary    •over 1,000 terms defined. Site Index Site Index

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