Good sources for teachers and students:

Sources I used to create these pages:

The Peoria Astronomical Society has an amazing set of pages devoted to all sorts of observational astronomical subjects, including a great page of Frequently Asked Questions.

SEDS is Students for the Exploration and Development of Space at the University of Arizona, Tuscon

ADC is NASA's Astronomical Data Center, operated by the National Space Science Data Center at Goddard Space Flight Center.

I would also like to thank the following people for contributing text to these pages:

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