|
|
|
|
Amateur Telescope Making Notes The Maker
   
There are two major types of optical telescopes: refracting telescopes, in which the image is formed by passing through a lens, and reflecting, where the image is formed bouncing off a curved mirror.
Ever since Galileo took a Dutch invention and adapted it to astronomical use, telescope making has been an evolving discipline.
Many astronomers after the time of Galileo built their own telescopes out of necessity, but the advent of amateurs in the field building telescopes for their own enjoyment and education seems to have come into prominence in the 20th century.
Many people are surprised when they find out that the optics for a 6 or 8 inch Newtonian reflecting telescope can be made by hand using the simplest of tools and materials. Since the invention of the telescope about 400 years ago, telescope making has always had an amateur component. Some amateur telescope makers were fascinated by the process itself, while others (like the great observer of the night sky, William Herschel) became amateur telescope makers as a means to their ultimate objective of exploration.
Newtonian Reflector is the most common telescope built by amateur telescope makers, large sections of the literature on the subject are devoted to fabrication of the primary mirror. The mirror has to be carefully "figured" to an extremely accurate shape, usually a paraboloidal, although telescopes with high focal ratios may use spherical mirrors since the difference in the two shapes is insignificant at those ratios. The tools used to achieve this shape are surprisingly simple, consisting of a of similarly sized glass "tool", a series of finer abrasives, and a polishing "pitch lap" made from a type of tree sap. Through a whole series of random strokes the “mirror” becomes a perfect spheroidal section. At that point it only takes a slight variation in polishing strokes to create the desired paraboloidal shape.
Common Misspellings include allthough altho, althought, altough alwasy, alwyas amatuer, amature adn, anbd becamae bu centruy componant extemely, extrememly, extremly, extremly facinated fiel fidn formant, fomed, fromed fomr, frome gerat, graet, grat, gret ahev, ahve, haev, hvae, hvea inot larg liek, liuke litature, literture maked amking, mkaing lonly, onyl pwn peopel proccess, proces prominance similiarity, similarily, similiarly sicne, sinse siezed smoe, soem suprised, suprized, surprized suprisingly, suprizingly, surprizingly tkaes taht, tath, thast, thgat, thta, thyat hten, tghe, ther, thge, tjhe ther, theri, thier, thier their, ther htey, tehy, tyhe htis, thsi, tihs ethose, thsoe throught, thru tiem, timne, tiome twpo uise unsed useing usally, usualy ususally wehn, whn hwihc, whcih, whic, whihc, whlch, wich hwile hwole, wohle eyars, eyasr, yeasr, yeras, yersa
Date Connection History of Newtonian Telescope Journal Article Brixner Telescope Amateur Telescope Making cup cakes empty cans of Pringles Reasons to use White Background Websites IF JESUS CAME TO YOUR HOUSE…! A LETTER FROM JESUS Evel Knievel Dead November 30 500 year american map Dogs dog bite-related fatalities Why Viagra is bad for you Cialis Viagra is a Health Risk How To Shelter in Place During Chemical Emergencies How To Disinfect Water by Boiling How To Survive Disasters without Preparation How To Have a Fun and Safe Halloween How To Treat Common Bug Bites How To Treat a Bee Sting How To Treat a Sunburn How To Avoid Traveler's Diarrhea How To Treat Hypoglycemia (Low Blood Sugar) How To Become a Paramedic How To Dress a Wound How To Treat a Jellyfish Sting How To Teach Kids to Call 911 How To Escape a Rip Current Hot To Splint A broken Hand How To Recognize a Medical Emergency How To Treat Rat Bites How To Treat for Shock How To Treat Cat Bites and Scratches How To Deliver a Baby How To Recognize and Treat Heat Stroke How To Treat Dog Bites How To Treat Dog Bites Causes of Abdominal Pain How To Treat an Amputation How To Treat a Black Eye How To Treat Broken Bones How to Control Bleeding Symptoms of a Heart Attack Carbon Monoxide Poisoning How To Do the Heimlich Maneuver Causes and Treatment of Confusion How To Perform Cardiopulmonary Resuscitation (CPR) How To Treat a Laceration Common Causes of Vertigo (Dizziness) How To Treat an Eye Abrasion How To Treat an Impaled Object in the Eye How To Wash Your Hands How To Treat an Impaled Object Flu Facts From the CDC Food Poisoning How To Treat Frostbite Head Injury
Recognition, First Aid for Skull Fracture & Closed Head Injury Symptoms of a Heart Attack How To Recognize and Treat Heat Exhaustion How To Recognize and Treat Hypothermia Common Causes of Nausea and Vomiting US Presidents James Monroe John Quincy Adams
|
|
|
|
