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Optical aberrations in amateur telescopes. Includes principles of physical and optical imaging with detailed review of primary aberrations. Also, aberrations in

It has never been easier to explore the fascinating world of astronomical spectroscopy with backyard telescopes.

The Hamilton Amateur Astronomers is a group of individuals dedicated to the enjoyment and advancement of astronomy.

Only a small fraction of amateur astronomers participate in professional research, but they have made, and continue to make important contributions to the field.

I have been involved in amateur telescope making (ATM) for over 20 years. In that time I have built many different telescopes and other instruments.

For a long time, mentioning the name steroids triggers a sense of fear due to the adverse side effects associated with their use. However, the tainted image of

The Celestron SkyProdigy 130 is the first consumer telescope to offer fully automatic alignment. Once you set it up under the night sky, it takes about 3 minutes for

When complete, this will be the largest telescope of its kind built by amateur astronomers. Astronomical (use) telescopes are generally equatorially mounted.