Optical aberrations in amateur telescopes. Includes principles of physical and optical imaging with detailed review of primary aberrations. Also, aberrations in popular reflecting, refracting and catadioptric telescope objectives, telescope eyepiece and human eye.

telescopes and amateur telescope making articles by Mel Bartels

Cardiovascular problems. Since these steroids are meant to improve performance and increase muscle tissue, the heart is going to be affected in one way or the other.

The ATM’s Workshop is a web site which provides Do-It-Yourself information for amateur telescope makers and astronomy enthusiasts.

The earliest existing record of a telescope was a 1608 patent submitted to the government in the Netherlands by Middelburg spectacle maker Hans Lippershey for a refracting telescope.

Astronomy Before the Telescope. It is difficult to appreciate how important the sky overhead was to our ancestors. In an age of artificial light, the night sky has vanished for most city dwellers.

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. This web page chronicles just …

Astronomy Telescope Making Web Site. Hello Fellow Stargazers, and Welcome to the Astronomical WebHub of the Vega Sky Center.

Astronomers! Whether you are a beginner or an advanced amateur astronomer, we welcome you to attend the RTMC Astronomy Expo, …

An optical telescope is a telescope that gathers and focuses light, mainly from the visible part of the electromagnetic spectrum, to create a magnified image for direct view, or to make a photograph, or to collect data through electronic image sensors.