81. Mark's Notes For The Amateur Telescope Maker Surely the making and putting into use of a powerful astronomical telescope goes far toward properly orienting one s self in the great scheme of things. http://telescopemaking.org/

var sc_project=521022; var sc_partition=3; var sc_invisible=1; Mark's Notes for the Amateur Telescope Maker "Surely the making and putting into use of a powerful astronomical telescope goes far toward properly orienting one's self in the great scheme of things." Latest News: I've been trying to scan in some of the hard to find articles that might be of interest to other telescope makers, and to make them available. The first of these is the Bulletin A DJVU format, which is a highly compressed but high quality format for scans. You can download a viewer for Windows from Lizard Tech News: I've recently moved this website from my poor aging 133Mhz Pentium 5 (damn fine little machine, very reliable) to my poor aging dual 400Mhz Celeron box. Since the machine is faster, I can do a bit more with it. Toward this end, I've registered the domain brainwagon.org , and started a weblog that concentrates mostly on science, but will stray into whatever areas I think are interesting, including astronomy, building scientific instruments and telescope making. I'm also pondering the creation of a telescopemaking weblog. Stay tuned for more information. Introduction By way of introduction, just let me say that I love telescope making.

82. SCIENCE HOBBYIST: Make A Simple Telescope A telescope with a tube is nice, but it s more complicated than necessary. A telescope with adjustable focus is useful, but it s hard to build. http://amasci.com/amateur/teles.html

SCICLUB SCI. HOBBYIST SURPLUS OPTICS GOOD STUFF ... SEARCH Google: ULTRA-SIMPLE TELESCOPE (c)1996 William J. Beaty MAKE A BEGINNER'S TELESCOPE A telescope with a tube is nice, but it's more complicated than necessary. A telescope with adjustable focus is useful, but it's hard to build. A project that's too complex and difficult will drive people away, when the goal is to tempt them into building it. Here is an extremely easy version of a Telescope Build-it project. No cardboard tube or adjustable focus mechanism is required. All that you need is a pair of lenses. Tempting? THE LENSES Two lenses are needed to build a telescope. We call these the "objective" lens and the "eyepiece" lens. The "Objective" lens should always be a convex lens. Convex lenses are thicker in the middle, and can be used as magnifying glasses or for concentrating sunlight. Try to find one which is large and weak. The weaker it is, the more powerful your telescope will be. The thinner it is in the center, the weaker it is. The "eyepiece" lens can be either a convex or concave lens. If you use a convex eyepiece, your telescope will turn everything upside-down. This kind of telescope is called a "Newtonian." And if you use a concave lens as your eyepiece, your telescope will not turn things upside-down. This type of scope is called a "Galilean."

83. Excelsis Ratings/Reviews - Telescope Reviews Checking Your Telescope Starting out in Amateur Astronomy How to use This Site Why Register? Get rid of the ads! http://excelsis.com/1.0/section.php?sectionid=12

84. HubbleSite - Hubble Is A Reflecting Telescope Hubble works on the same principle as the first reflecting telescope built in the 1600s by Isaac Newton. Light enters the telescope and strikes a concave http://hubblesite.org/hubble_discoveries/hstexhibit/telescope/about.shtml

Hubble works on the same principle as the first reflecting telescope built in the 1600s by Isaac Newton. Light enters the telescope and strikes a concave primary mirror, which acts like a lens to focus the light. The bigger the mirror, the better the image. In Hubble, light from the primary mirror is reflected to a smaller secondary mirror in front of the primary mirror, then back through a hole in the primary to instruments clustered behind the focal plane (where the image is in focus). Mirror size Primary mirror: 2.4 m (94.5 inches) in diameter Secondary mirror: 0.3 m (12 inches) in diameter Angular resolution Hubble's angular resolution is 0.05 arcsecond. This is the "sharpness" of Hubble's vision. If you could see as well as Hubble, you could stand in New York City and distinguish two fireflies, 1 m (3.3 feet) apart, in San Francisco. About The Exhibition

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