Heavens Above
http://www.heavens-above.com
Satellite predictions for your location plus customizable star charts and much more.

Astronomy Picture of the Day
http://antwrp.gsfc.nasa.gov/apod/astropix.html
Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

Telescope Review Web Site
http://www.scopereviews.com
Comprehensive reviews of over 100 telescopes and accessories, a beginner's advice column, feature articles, and more.

Lunar Photo of the Day
http://the-moon.wikispaces.com/LPOD
A photo of the moon each day with caption.

The Messier Catalog
http://www.seds.org/messier
Detailed information and photos of the most beautiful objects in the sky including nebulae, star clusters, and galaxies.

Space Weather
http://spaceweather.com
News and information about the Sun-Earth environment: sunspots, solar activity, aurora, space mission news, and near-Earth asteroids.

The Nine Planets
http://www.nineplanets.org
A multimedia overview of the history, mythology, and current scientific knowledge of the planets, moons and other objects in our solar system with text and NASA's images.

Exploring the Planets
http://www.nasm.si.edu/research/ceps/etp/etp.htm
Loads of information about the solar system from the National Air and Space Museum.

Solar System Live
http://www.fourmilab.ch/solar/solar.html
An interactive orrery: you can view the entire solar system, or just the inner planets (through the orbit of Mars). Controls allow you to set time and date, viewpoint, observing location, orbital elements to track an asteroid or comet, and a variety of other parameters.

The Astronomy Cafe
http://www.astronomycafe.net
"A web site for the astronomically disadvantaged. Do you have questions about space that you can't seem to get answers to? Sit down, grab a cup of your favorite beverage, and have a look around!"

Eclipse Home Page
http://eclipse.gsfc.nasa.gov/eclipse.html
NASA's eclipse web site with all you could want to know about past, present, and future solar and lunar eclipses.

The Constellations and Their Stars
http://www.astro.wisc.edu/%7edolan/constellations
Comprehensive information about the constellations.

Astronomy Software
http://www.midnightkite.com/software.html
Links for hundreds of freeware, shareware, and commercial astronomy programs for Windows, Macintosh, UNIX, and Interactive Web Pages.

ObservingSites.com
http://www.observingsites.com
Directory lists dozens of observing sites in 36 states and six Canadian provinces -- all contributed by people who enjoy viewing the real universe, away from city lights and haze.

Keith's Moon Page
http://home.hiwaay.net/%7ekrcool/Astro/moon/#bmd
A collection of moon facts, moon phases, moon photos and moon folklore.

Astronomy Clubs
http://www.astronomyclubs.com
List of thousands of astronomy clubs around the globe.

International Dark Sky Association
http://www.darksky.org
An organization dedicated to preserve and protect the nighttime environment and our heritage of dark skies through quality outdoor lighting.

Weekly Information About Bright Comets
http://www.aerith.net/comet/weekly/current.html
Keep current with comets that appear in our sky.

Ian Ridpath's Star Tales
http://www.ianridpath.com/startales/contents.htm
Myths, legends, and history of the constellations.

Ancient Astronomical Cosmology
http://www.astronomy.pomona.edu/archeo
World's ancient cultures and their relationship with the skies.

Greek Astronomy
http://www-gap.dcs.st-and.ac.uk/%7ehistory/HistTopics/Greek_astronomy.html#s23
Ancient Greek astronomy and astronomers.

Cosmic Evolution
http://www.tufts.edu/as/wright_center/cosmic_evolution
History of the universe from Big Bang to Humankind.

Sunheight
http://sunheight.free.fr
Accurate sun, moon, planet rise/set graphs and data.

Stars and Star of the Week
http://www.astro.uiuc.edu/%7ekaler/sow/sow.html
A comprehensive suite of pages that tell the stories of stars and their constellations, dedicated to the proposition that each star is unique; also constellation information.

Traditions of the Sun
http://www.traditionsofthesun.org
Native American solar practices, especially at Chaco Canyon.

Bad Astronomy
http://www.badastronomy.com
Phil Plait's site on bad astronomy -- astronomy misconceptions and errors in the movies and on the news.

Hitchhikers Guide to the Moon
http://www.shallowsky.com/moon/hitchhiker.html
A guide to telescopic observations of the moon by Akkana Peck, with help from many contributors.