WARNING: While the World Wide Web is a great resource for astronomy, it is worth remembering that anybody can post anything on the Web. As a result, you can find lots of web sites with crackpot theories that are not at all supported by observation.

All of the web sites listed below will help you locate real, solid science on the Web. You can also find "the good stuff" at web sites associated with a university astronomy or physics department, or with organizations such as NASA or the Space Telescope Science Institute.

You will also find links to many useful web sites in the eBook version of your textbook.

The companion web site to your textbook, UNIVERSE

Astronomy Picture of the Day --- a new picture every day, with a description written by a professional astronomer. Highly recommended!

The Space Telescope Science Institute (STScI) --- home of the Hubble Space Telescope (HST), and repository of all of the public images from HST.

The entertaining "Bad Astronomy" web site can help you separate science from science fiction. It has great TV and movie reviews and explains many common misconceptions about astronomy.

The Jet Propulsion Laboratory (JPL) is home to most of NASA's robotic exploration of the solar system.

The Nine Planets --- an extensive tour of all of the planets and moons of our solar system.

"Ask the Experts: Astronomy" is a service of Scientific American. Read the answers to questions such as "Why do the moon and the sun look so much larger near the horizon?", "What is an optical interferometer?", and "Is the violent behavior of quasars caused by black holes in galaxies?" All of the answers are provided by professional astronomers.

The Apollo Lunar Surface Journal has transcripts and images from the Apollo landings on the Moon. (Click here for a web page that debunks the silly "Moon hoax" idea.)

News and images from the European Southern Observatory (ESO)

SETI at Home --- a web site from UC Berkeley that explains how you can use your home computer to help in the search for extraterrestrial intelligence.

Solar System Simulator --- view any of the worlds of the solar system from any vantage point you choose.

SEDS Messier Database --- beautiful images of and information about the Messier catalog of deep-sky objects. Also see The Web Nebulae and the Messier Picture Gallery (University of Alabama).

The web site for Sky & Telescope magazine has the latest news from the world of astronomy as well as plenty of tips for beginning observers.

Portraits of stars and constellations

The NASA Homepage

The European Space Agency (ESA) Homepage

News and images from the National Optical Astronomy Observatories (NOAO)

News and images from the orbiting Chandra X-ray Observatory

News and images from the orbiting Spitzer Space Telescope

Links to hundreds of astronomy sites

NGC/IC Project Public Database --- data on objects from the NGC and IC catalogs of deep-sky objects.

Deep-sky photographs from the Anglo-Australian Observatory (beautiful stuff!)