10 Astronomy Facts
What is astronomy? Astronomy is a science that studies celestial objects such as the Sun, planets, moons, stars, nebulae & galaxies.
Glossary of Astronomy Terms
Our glossary of astronomy terms contains definitions for some of the most common words used in astronomy, cosmology, astrophysics, and space exploration.
Our Solar System
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Frequently Asked Astro Questions (F.A.A.Q.)
How far away is the Moon? Why is the Sky blue? How old is the universe? This page contains answers to some of the most common questions encountered in the amateur astronomy hobby.
The Messier Catalog - Deep Sky Objects
The Messier catalog contains a listing of 110 of the most popular deep sky objects. Learn where to find some of the most beautiful star cluster, nebulae, and galaxies in the night sky.
Detailed Astronomical Events Calendar
Our calendar of celestial events contains one of the most complete listings of upcoming events anywhere on the Internet. Find dates for moon phases, eclipses, meteor showers, planetary events, and more.
Astronomy & Astrophotography Equipment Guide
Our quick astronomy equipment guide will help to familiarize you with many of the basics of the astronomy hobby. Learn about telescopes, mounts, and the many types of accessories.
Astronomy & Processing Software
Check our listing of some of the most popular and useful astronomy software for your home computer, including planetarium programs, solar system simulators, star atlases, and satellite trackers.