Literally, there are hundreds of wonderful web sites in existence that contain astronomical content. Below, we have identified various sites that the Delta Astronomical Society recommends visiting.

www.heavens-above.com Heavens Above tracks the location of satellites in the sky.
www.cleardarksky.com Based on a numerical weather model, Clear Sky Charts are perhaps the most accurate and the most usable forecasters of astronomical observing conditions for over 1900 observatories and observing sites in North America.
www.astroviewer.com AstroViewer is an interactive sky map that helps you to find your way in the night skyquickly and easily.
http://squall.sfsu.edu/ Jet stream analysis maps attempt to highlight the location and strength of the jet streams.
http://apod.nasa.gov/ Discover the cosmos with NASA! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
http://galaxyzoo.org/ The Galaxy Zoo files contain almost a quarter of a million galaxies which have been imaged with a camera attached to a robotic telescope (theSloan Digital Sky Survey, no less). In order to understand how these galaxies — and our own — formed, we need your help to classify them according to their shapes — a task at which your brain is better than even the fastest computer.
www.pa.msu.edu/ The Talbert and Leota Abrams Planetarium, located on the beautiful Michigan State University campus, serves as an astronomy and space science education resource center for central Michigan.
pa.msu.edu/ The Night Sky Notes is a place on our web site that we use to keep skywatchers up to date on what’s up in the sky. Check back often to find out what’s new and visible in our ever changing sky. As we learn about something new, we’ll post it to this page as soon as we can. If you like to subscribe to news feeds, click the RSS link below. The posts will automatically show up in your news aggregator or feed reader.
nasa.gov/ Nasa.gov is an educational website for all ages.
space.com/ At space.com you can watch videos, read news or even join the community.
Mead.com/ Mead is a world famous telescope maker. You can learn all kinds of fun things about telescopes at mead.com.
Houston Astronomical Society Are you going to be in the Houston area? Drop by the Houston Astronomical Society and be apart of one of the largest astronomical societies in the US.
Scale of the Universe Here is a wonderful way to learn about what is truly small and big. Click here to scale your self throughout the universe.