| Astronomy |
 | Astronomy for Kids |
| | A free astronomy resource designed to teach children about the exciting world of outer space. |
| Astronomy Picture of the Day |
| | Astronomy Picture of the Day comes courtesy of NASA, along with a brief explanation of the photo. |
| Astronomy.com |
| | The world's best-selling astronomy magazine in on-line form. Special access and features for subscribers. |
| Eric Weisstein's World of Astronomy |
| | A combination dictionary and encyclopedia compiled and maintained by Internet encyclopedist Eric W. Weisstein, with assistance from the Internet community |
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| Dobsonian Telescope Resources |
| Build Your Own Dobsonian |
| | The United States Naval Observatory offers a how-to guide on creating your own 8-inch Dobsonian telescope. |
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