61. Howstuffworks "How Telescopes Work" Learn how telescopes work and what to consider if you are thinking aboutbuying one! Main Science Physical Science How telescopes Work. http://science.howstuffworks.com/telescope.htm

ComputerStuff AutoStuff ElectronicsStuff ScienceStuff ... PeopleStuff Categories Earth Science Engineering Life Science Physical Science ... Gas Turbine Engines Sponsored By: Explore Stuff Big List of Articles Get the Newsletter Shop or Compare Prices Orbitz - Plan a Trip! ... Physical Science How Telescopes Work by Craig C. Freudenrich, Ph.D. Photo courtesy of NASA Maybe you've been out looking at the stars in the night sky, searching for constellations; or maybe you've already learned your way around the constellations, and now you'd like to take a closer look at objects like the moon, planets or stars with the aid of a telescope A telescope is a device used to magnify distant objects. There are many types to choose from, and many price ranges to consider. How do you know which one is best for you? How can you be sure that you won't be disappointed when you take your new telescope out to see the stars? In this edition of How Stuff Works , we will examine how a telescope works, discuss the various types of telescopes and take a look at telescope mounts and accessories. To access all of the different parts of this article, choose from the map below:

62. Equatorial Platform - Reagan's Dob Tracker Information about stepper driven platform for dobsonian telescopes. Shows construction ideas and links to build a basic platform. http://www.geocities.com/reaganjj

Equatorial Platform - Reagan's Dob Tracker The best of both worlds - a Dobsonian mount with the ability to track the Earth's rotation. The equatorial platform moves with the earth's rotation for up to one hour, then it needs to be rewound. The eyepiece is always in an easy location for viewing and very accurate tracking is possible. DC motor linear drive screw (left) equatorial platform controlled by an H.O. Train power pack - very close to the design of Warren Peters (see below). My latest equatorial plarform (lower left) has a north cylindrical bearing and an axial south bearing. It is driven by a rollerblade wheel that contacts the north runner directly. It is powered by a stepper motor that turns a 10:1 reduction gear that is controlled by a microstepping controller. A second stepper is used to make small corrections for errors in polar alignment and uses a ballscrew that has 3/4" of travel. The second axis is driven by a standard stepper controller. The scope (100 lbs of load) sits flat north to south and rotates 15-degrees east to west. It can fast forward, fast rewind, fast correct, and slow correct (see drawing of indexer / hand controller). A second hand controller is used for the second axis. This equatorial platform puts an axial bearing through the center of Warren Peters' south cylindrical bearing (see Warren's link below). Details - Stepper Driven Platform with design sheets for both Warren Peters' and Chuck Shaw's directions.

63. MWO · Science · Telescopes In Education Program telescopes in Education Program. The main WWW page for the TIE Projectis at http//tie.jpl.nasa.gov/tie/ MWO Home Page Adaptive http://www.mtwilson.edu/Science/TIE/

Telescopes in Education Program The main WWW page for the TIE Project is at http://tie.jpl.nasa.gov/tie/ Last updated:

64. Small Dob Web Site This Web site is devoted to users of Dobsonian reflector astronomical telescopes (commonly referred to as Dobsonians or Dobs) with apertures of about 10 inches or less. http://personal.lig.bellsouth.net/lig/g/p/gpippin/

65. Stargazer Steve Telescopes Home of Stargazer Steve's excellent Sgr3 handmade telescope and the deluxe 4 1/4 inch kit you can Category Science Astronomy Manufacturers...... Order Info Prices. Getting Started in Astronomy Article for Beginners. Why Reflectingtelescopes? Links. REFLECTING telescopes THAT GIVE MORE SKY FOR LESS FROM http://stargazer.isys.ca/

Sgr-4 6" Deluxe Reflector Kit 4 1/4" Deluxe Reflector Kit Telescope Accessories ... Read SkyNews Review of the Deluxe Kit! Site Designed by Please report problems with this page to the Webmaster Universe Today - Space news from around the Internet, updated every weekday. REFLECTING TELESCOPES THAT GIVE MORE SKY FOR LESS FROM The Ready-to-use Sgr-4 (below) This 4 1/4-inch Reflecting Telescope comes complete with a rock steady natural-finish hardwood mount. "Objects were surprisingly bright and clear in these small aperture scopes. The instruments are perfect for wide-field buffs" "The Stargazer was set up the second I spread its tripod legs. This tripod demonstrates how rigid yet lightweight a good design can be." "...The Stargazer [Sgr-3], with a significantly darker background, allowed me to see more detail [in the Andromeda Galaxy]." The Deluxe Reflector Kit (right) comes with everything you need to make this exceptional 4 1/4-inch scope This kit is easily built in just a few hours so that you can enjoy the heavens that same night!

66. South African Astronomical Observatory - Home Page An introduction to the SAAO, a description of instrumentation and telescopes, an observation schedule, and information on educational opportunities. http://www.saao.ac.za/

Home News SAAO in brief SALT ... Links Search: Vacancies Director Doctoral Scholarships in Astronomy and Astrophysics for 2004 Viewing the sky in April South African Astronomical Observatory P.O. Box 9, Observatory, 7935, South Africa Phone: +27 (0)21 447-0025 Fax: +27 (0)21 447-3639 enquiries@saao.ac.za http://www.saao.ac.za Dated: 7 April 2003

67. Camera House Photographic retail chain in Australia with more than 110 Locations. We stock a range of cameras, film, telescopes, and binoculars. http://www.camerahouse.com.au/

68. Danish Telescopes Danish telescopes. This service gives links to pages describing Danishtelescopes currently in use. Click on Instrument Centre. telescopes http://www.astro.ku.dk/~michael/dantel.html

Danish Telescopes This service gives links to pages describing Danish telescopes currently in use. Click on the iconized images to see the bigger versions and click on the text to move to the info-pages. Any questions/suggestions are welcome at: michael@astro.ku.dk . For more information about Danish telescope and instrument development see the pages of the Astronomical Instrument Centre Telescopes: The Nordic Optical Telescope (NOT) The Danish 1.54 m Telescope The Carlsberg Meridian Telescope Telescopes at the The Brorfelde Schmidt Telescope Telescopes at the Brorfelde Observatory Student operated facilities: The New Student Telescope (NeST) The Boserup Amatuer Observatory (BAO) Last update: September 24th, 1999 by MYKAL

69. Computer Operated Telescopes Features plans and designs for stepper or servo motor layouts as well as features, free software, and howto information. Links to pictures of other amateur computerized newtonians included. http://www.bbastrodesigns.com/cot/cot.html#CONTENTS

Computer Operated Telescopes by Mel Bartels for sale: stepper and servo systems news amateurs' COTs table of contents ... contact Mel While software can reside on a microcontroller, it is my style to execute it on a laptop, allowing the hardware to be simple and flexible. In addition, a laptop has sufficient computing power and a full bodied user interface, so that adequate attention may be given to precise tracking (sub arcsecond over many minutes), precise goto (35 arcsecond rms from horizon to horizon), and all encompasing error correcting routines. My software also tends towards straightforward text interfaces, as complex graphical environments are hard to operate in the dark and injurious to night vision. Finally, the ease of developing software and getting bug fixes and enhancements out to users the next evening should not be underestimated for laptop and PC platforms. stepper system servo system Advantages 1. low cost 2. instantly responsive motors Advantages 1. can use any operating system that supports a serial link 2. larger motor dynamic range means faster slews

70. The Telescope Store - Full Line Of Telescopes & Accessories Celestron and Meade telescopes, binoculars, microscopes and accessories, including NexStar 8, with Category Science Astronomy Dealers......Large selection of telescopes and accessories including these brands Meade,Celestron, Orion, Tele Vue, and Discovery. THE NEW CGE telescopes. http://www.telescopes-earth.com/

LOWEST TELESCOPE AND ACCESSORY PRICES ON THE WEB! NO SALES TAX IN NH! CHECK OUT ABOUT US ABOUT TELESCOPES EYE PIECE FILTER GUIDE CELEBRATING OUR 11th YEAR REFRACTORS REFLECTORS MIRROR/LENS SPOTTING SCOPES ... SALE ITEMS IMPORTANT NEWS (SCROLL DOWN) CELESTRON MEADE ORION DISCOVERY NEXSTAR 8GPS $500 REBATE Extended to 4/31/03 Free AutoStar Controller & Tripod "SAVE $350.00 All the Power of a Standard 4.5" Newt, Yet Only Half the Length! Discovery Telescopes- High Standard Pre-mium Pyrex Optics TELE VUE CELESTRON MEADE CELESTRON Pronto elevates high qual-ity spotting scopes to a new level of versatility NEW PRODUCTS FROM CELESTRON FOR 2003 Super Plossl Eyepiece set for only with purchase of Meade Telescope. EXTENDED TO APRIL 30, 2003 THE NEW CGE TELESCOPES LIMITED TIME ONLY.....25% OFF CELESTRON EYEPIECES

71. Antique Microscopes, Globes, And Telescopes - ARSmachina Buys and sells antique brass microscopes and telescopes. Credit Cards accepted. http://arsmachina.com

antique microscopes,antique telescopes,globes,compasses,dials scientific instruments arsmachina.com microscopes telescopes the fine art of science sporting collectibles ... dials tom grill var site="sm2ars"

72. Beacon Hill Telescopes http://www.beaconhilltelescopes.mcmail.com/

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73. Guide To Telescopes For The Beginner The number one rule about buying telescopes Don't buy from a department store! Want some more information? http://www.geocities.com/CapeCanaveral/Launchpad/4515/telebeginnger.html

Telescopes for the Beginner Courtesy Meade Before You Buy You've Decided to Buy Getting the Basics Types of Telescopes ... Astronomy Magazine Telescope reviews. Don't forget to stop in at the places who make the telescopes! Meade Instruments Corporation Celestron If the information you dig up leaves you feeling more confused, think about joining a local astronomy club. Some are free, others have a low annual membership fee. You will meet many other people at the meetings who already have telescopes. They can give you advice and give you ideas of costs, portability, and dealers in close surrounding areas. Almost every club hosts star parties in which members who have telescopes bring them along. This gives you a chance to look through a variety of different scopes. It also lets you see what kind of size you are willing to tote around. It allows you to interact with other people who have the same interest. This is a fantastic way to make new friends. I've heard of a few clubs that rent telescopes to their members for a nightly charge. I have no idea how much, but it would be worth looking into. Beginning of Page You've Decided to Buy First, get familiar with the sky. Can you find the Andromeda galaxy? What kinds of nebulas are there in the different constellations? It is best to buy a book that includes descriptions and star charts for the beginner. Also, subscribe to a popular astronomy magazine. Most of them are aimed directly at the back yard observer.

74. Litebox Telescopes This page is intended for those who already own telescopes and understand the basicsof Newtonian optical systems. I have built 42 telescopes as of March 2002. http://www.litebox-telescopes.com/

This site will introduce you to a telescope for contemporary times, when wonderful optics crash headlong into the spreading problem of light pollution. Imagine a 12.5" telescope in your passenger seat, or an 18" scope in the back seat of any car, and imagine a design which does not compromise on shielding or rigidity. Say goodbye to 3/4" ply and find the best spots in the dark country sky. Purpose How big a scope can you transport and hand carry? Mine... To share my research, design and developments in the realm of ultra-portable, maximum-use, state-of-the-art starware. This page is intended for those who already own telescopes and understand the basics of Newtonian optical systems. My scope designs have grown out of an obsession with visual astronomy. If that is your interest, then please read on. 12.5" scope packed for car transport. Yours... You love stargazing and your current scope is slowing you down with it's bulk, it's weight, it's complexity and it's sticky bearings. Or perhaps you are ready for an increase in aperture but fear it will become an immovable object. You want a durable ultra-light scope with optics you choose and smooth, well-damped motions. You are curious about LITEBOX. Background 18" and 12.5" scopes in the back of a van.

75. Binoculars.com Offers a selection of optics including binoculars, telescopes, and nightvision. http://www.binoculars.com/

Call Toll-Free: 1.800.246.6285 Under $50 Over $250 Astronomy Birding ... Zhumell View binocular comparisons at Binoculars.org All best sellers are in stock Minolta Activa 8x40 WP FP Bushnell 8x30 Off Trail Compact Pentax 8 X 25 UCF X Zhumell Long Eye Relief 10x50WA ... more... Image Stabilization - A recent technology that continues to ... Buy Now Canon Nikon ... more... Action Series - "Zoom" - to move quickly from one place to another ... Buy Now Zhumell Bushnell Nikon ... more... Deepspace A value-priced ticket to the stars ... Buy Now Bushnell Celestron ... more... Eterna Monocular - Waterproof, Fogproof, Nitrogen ...

76. Mt. Regina Observatory Links to images of comets, NGC objects and planets plus information on telescopes and links to various astronomyrelated areas. http://members.aol.com/Drx99/Mt.html

77. Stazione Di Loiano Observing at the Asiago telescopes. http://www.bo.astro.it/loiano/

Osservatorio Astronomico di Bologna Stazione di Loiano Lat. 44º 15' 30" N Long. 11º 20' 12" E 785 m a.s.l. General Informations The 60 cm Telescope The 152 cm Telescope Observing at the 152 cm Telescope ... Time Allocation Commettee (restricted access) Person in charge Dr. Valentina Zitelli [Home] Virtual sky resources Loiano Sky Maps(by Your Sky Virtual Telescope Stars charts (by Polaris Observing at the Asiago Telescopes

78. Lomo PLC Home Offers telescopes, microscopes, endoscopes, cameras, night vision equipment, and special aerospace and military equipment. http://www.lomoplc.com/index2.html

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79. Welcome To Software Bisque's Web Page High quality astronomy software and high tech parts and telescopes accessories. http://www.bisque.com

Generate free star charts or control a simulated telescope to see a picture of any part of the sky! Home Products Support Our Store ... iBisque Software Bisque 912 12th Street Golden, Colorado 80401-1114 USA Sales: (800) 843-7599 International: (303) 278-4478 Facsimile: (303) 278-0045 Contact Us Web site feedback About Software Bisque Site Map

80. 2MASS - Telescopes 2MASS is being carried out by a pair of identical, fully dedicated, 1.3meter cassegrain equatorial telescopes that are located at Mt. http://pegasus.phast.umass.edu/2mass/pub/telescope.html

2MASS is being carried out by a pair of identical, fully dedicated, 1.3 meter cassegrain equatorial telescopes that are located at Mt. Hopkins , near Tucson, AZ, and Cerro Tololo , near La Serena, Chile. You can also look here to see the northern telescope being installed in it's dome. Each telescope is equipped with a camera Below are images of the Northern Hemisphere telescope in production in Tucson, Arizona and installed in the Mt. Hopkins dome with the survey camera attached. M3 Engineering of Tucson was the prime contractor for both the Northern and Sourthern survey telescopes. Go HOME

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