41. Global Network Of Astronomical Telescopes a nonprofit organization dedicated to being a catalyst and information source for all those interested in research and education using relatively small astronomical telescopes. http://www.gnat.org/~ida/gnat/

What's New Information Meetings Archives ... Links GNAT is a non-profit organization dedicated to being a catalyst and information source for all those interested in research and education using relatively small astronomical telescopes. For more information, contact: David L. Crawford or Eric R. Craine crawford@gnat.org craine@gnat.org E-mail is the best way to contact us. 2127 E. Speedway, Suite 209 Tucson, AZ 85719 USA FAX (520) 327-1388 http://www.gnat.org/~ida/gnat/index.html (GNAT Home Page) Last updated: 19 May 2003 Page may be reproduced for non-commercial use provided that credit is given to GNAT.

42. Howstuffworks "How Telescopes Work" Learn how telescopes work and what to consider if you are thinking about buying one! Search Google, Main Science Physical Science How telescopes Work. http://science.howstuffworks.com/telescope35.htm

ComputerStuff AutoStuff ElectronicsStuff ScienceStuff ... PeopleStuff Top Subjects Car Engines Lock Picking Nuclear Bombs Tattoos ... Gas Turbine Engines Sponsored By: Categories Earth Science Engineering Life Science Military ... Browse the Science Library Explore Stuff Lidrock.com Big List of Articles Get the Newsletter Shop or Compare Prices ... Search HSW and the Web Search Google Main Science Physical Science How Telescopes Work by Craig C. Freudenrich, Ph.D. Table of Contents Introduction to How Telescopes Work How They Work Refractors Reflectors Compound or Catadioptric Telescopes Telescope Mounts Eyepieces Other Accessories Make Your Own Telescope What They Can Do The Moon The Sun The Planets Comets and Meteors Deep-Sky Objects Astrophotography Features What Type of Telescope Do I Need? Optical Features Non-Optical Features Telescope Mounts Eyepieces Finders Star Diagonals and Erecting Prisms Filters Practical Considerations Other Accessories When You Shop Look Out! Where to Buy Manufacturers FAQ Cool Facts Books Lots More Information Shop or Compare Prices Lots More Information History of Telescopes Virtual Museum of the History of the Telescope The Galileo Project: The Telescope The Galileo Project: Making a Galilean Telescope The Galileo Project: Using a Galilean Telescope ... HubbleSite - Telescope History Telescopes Orion Telescope and Binoculars: Learning Center Orion Telescope and Binoculars: Equipment Basics 101 Epinions: Picking a Telescope Purchasing a Telescope ... How Does That Work? Telescope

43. SAO Telescope Data Center Creates, and maintains software to process and archive data from optical telescopes at the Oak Ridge Observatory in Harvard, Massachusetts, Whipple Observatory, and Multiple Mirror Telescope on Mt. Hopkins in Arizona. The Smithsonian Astrophysical Observatory (SAO) is part of the Harvard Smithsonian Center for Astrophysics (CfA) in Cambridge, Massachusetts. http://cfa165.harvard.edu/

Harvard-Smithsonian Center for Astrophysics The SAO Telescope Data Center in Cambridge, Massachusetts , supports proposing scheduling observing computing , data reducing and analyzing, and data archiving for these optical telescopes Telescopes and Instruments ... Oak Ridge Observatory in Harvard, Massachusetts Whipple Observatory on Mt. Hopkins in Arizona. 48" schedule 60" schedule (Quarterly Report) (Email for Problems) ... MMT Observatory on Mt. Hopkins in Arizona. MMT schedule Time Allocation Committee ... skymap Making Charts from Astronomical Catalogs (Making Images) Software: widl Making Finding Charts from DSS Images Data svdfit Removing sky from spectra ApJ Letters paper Reduction stelircam Reducing Stelircam output Software hectospec Reducing Hectospec output Data rvsao Computing Redshifts in IRAF papers Analysis SAOimage Displaying Images papers Software: WCSTools Using Sky Coordinates in Astronomical Images papers Image header manipulation utilities Results Updated Zwicky Catalog of Galaxies CfA Redshift Survey Large Scale Structure Galaxy and Cluster LX-sigma Relation ... Spectra of Supernovae Resources Spectrograph Archives [Z-Machine] [FAST] [UZC(both)] ... Mt. Hopkins Interactive Tour

44. Www2.keck.hawaii.edu3636/ Isaac Newton Group of telescopesThe Isaac Newton Group of telescopes (ING) operates three worldclass telescopes on La Palma, Canary Islands, Spain. The Isaac http://www2.keck.hawaii.edu:3636/

45. Cerro Tololo Inter-American Observatory Home Page A complex of astronomical telescopes and instruments located approximately 80 km to the east of La Serena at an altitude of 2200 Meters. http://www.ctio.noao.edu/

CERRO TOLOLO INTER-AMERICAN OBSERVATORY Click picture for larger downloadable images JPEG Photo by Roger Smith. CTIO HEADLINES: CTIO actively seeks the views and suggestions of the scientific community regarding new Blanco 4m telescope instrumentation, such as the Dark Energy Camera proposed by the Dark Energy Survey Consortium. Finding Our Nearest Stellar Neighbors. RECONS astronomers investigate our Sun's immediate galactic surroundings. Giant Galaxy String Defies Models of How Universe Evolved. Wide-field observations of the early Universe discover an enormous 300 million light-years long string of galaxies. For additional NOAO news, see the NOAO Press Release page POSITIONS AVAILABLE AT CTIO Check out these job opportunities in Chile! Assistant to the Director of CTIO Check here for complete list of all NOAO job listings. Cerro Tololo Inter-American Observatory (CTIO) is a complex of astronomical telescopes and instruments located approximately 80 km to the East of La Serena, Chile at an altitude of 2200 Meters. Phone (011)-56-51-205200. Observer Resources Proposal Information Telescope Schedules Observing at CTIO Telescopes at CTIO ... CTIO Telescopes and Instrumentation - The Future Other Telescopes on Site SOAR 4m Telescope Gemini 8m South GONG El Enano (The Dwarf) ... Observatorio Mamalluca Education CTIO REU Program (US students) CTIO Programa PIA (Estudiantes Chilenos) Planetario Movil Gemini/AURA/Tololo REDLASER: Red de Estudiantes de La Serena General Information Weather and Environmental Conditions CTIO Staff and Visitors CTIO/AURA Site Details Travel and Tourism in Chile ... Preserving Dark Skies Science Resources

46. Starmaster Portable Telescopes S A V E !!! From now until June 30, 2004, Starmaster telescopes is offering a $300 Rebate on all 20 telescopes, and a $200 Rebate on all 18 telescopes! http://www.starmastertelescopes.com/

S A V E From now until June 30, 2004, Starmaster Telescopes is offering a $300 Rebate on all 20" Telescopes and a $200 Rebate on all 18" Telescopes This is in addition to the 3% Cash Discount! S A V E Welcome to Starmaster™ Telescope's web page. Thank you for taking the time to visit our little corner of cyberspace. Starmaster manufactures two lines of telescopes our 11" and 12.5" ELT Scopes , and our 14.5" through 24" conventional Truss Scopes . We have also included information about our Optics and Quality Assurance program, as well as an Owner Feedback section with comments we've received from our customers, a Starmaster Owners Photo Album and even email addresses of scope owners who can answer your questions from the users point of view. There is other information as well, so take a few minutes and explore our site. If you can't find what you're looking for, try our or drop us an email Also note that we are now accepting international inquiries. Check out our new 11" AND 12.5"

47. Eagle Optics - Binoculars, Spotting Scopes, And Telescopes Mailorder company offering a complete selection of binoculars, spotting scopes, telescopes, tripods, and accessories. Articles about birding and buying optics for birding. http://www.eagleoptics.com/

Binoculars, Spotting Scopes, Telescopes and Outdoor Gear at Eagle Optics; for the experience, courtesy and professionalism you deserve. Quick Search: Buying Guide All Binoculars Manufacturer Notes ... Shopping Cart A waterproof, close-focus, phase-corrected roof prism with good eye relief for under $250? You bet! Check out the Audubon Equinox Binoculars Free Radian Pro GT Tripod with purchase of an Eagle Optics Raven Spotting Scope! Click here for details Featured Products Bushnell Binoculars Legend 8x32 Rugged, compact, roof prism binoculars that are small enough to be taken anywhere. Price: $229.00 Masterpiece Collection Concerto Theater Glass Stylish optics for the theatre! Built in light, too! Price: $39.95 Canon Binoculars Image Stabilized 12x36* Unique electronic image stabilization system. Featured Articles Manomet Center for Conservation Sciences Eagle Optics is proud to be the Lead Corporate Sponsor for Manomet Center for Conservation Sciences shorebird study project in the Arctic National Wildlife Refuge. more...

48. Global Network Of Astronomical Telescopes dedicated to being a catalyst and information source for all those interested in research and education using relatively small astronomical telescopes. http://www.darksky.org/~ida/gnat/

What's New Information Meetings Archives ... Links GNAT is a non-profit organization dedicated to being a catalyst and information source for all those interested in research and education using relatively small astronomical telescopes. For more information, contact: David L. Crawford or Eric R. Craine crawford@gnat.org craine@gnat.org E-mail is the best way to contact us. 2127 E. Speedway, Suite 209 Tucson, AZ 85719 USA FAX (520) 327-1388 http://www.gnat.org/~ida/gnat/index.html (GNAT Home Page) Last updated: 19 May 2003 Page may be reproduced for non-commercial use provided that credit is given to GNAT.

49. Scope City - Worlds Largest And Most Complete Optical Centers Offering telescopes, binoculars, spotting scopes, microscopes, night vision, and accessories. http://nightvisioncity.com/

Welcome to Scope City The Largest and Most Complete Optical Centers in the World. Scope City offers you extensive experience in the Optical Industry, a friendly and knowledgeable non-commission staff, and the most complete collection of optical goods at the most competitive prices. NAME A STAR ! Name Your Star - Online Starting at ONLY $39.95 Click Here ... Also availble at all Scope City showrooms - Click Here FREE ACCESSORIES ! Click Here for Details Parks 8x42 or 10x42 Our Best Selling Waterproof / Fogproof Bino! ONLY $199.95 ~ Click Here The Largest Collection ... Job Opportunities Orders and Information: 1-800-235-3344 (National) 1-800-847-2673 (California) Scope City unconditionally guarantees that you will be 100% satisfied with your mail order purchase, or just return the merchandise in original condition within 15 days for a Full Refund, less shipping and handling charges.

50. Woodland Hills Camera & Telescopes - TOLL-FREE 1-888-427-8766 Best Prices and Best Service for over 45 years, Woodland Hills Camera and telescopes features cameras,telescopes,binoculars,night vision,slr cameras,digital http://www.telescopes.net/

ORDER TOLL FREE: Serving You for Over 50 Years !! Bushnell Canon Celestron Coronado Fujinon JMI Kendrick Leica Losmandy ... CLICK HERE FOR MORE INFO!! EXPERIENCED HELP WANTED - CALL 818-347-2270 SPECIAL OFFER!! ACCESSORIES!! TELESTAR DS 2130AT ... REFURBISHED Compare at $400.00 NEW! ETX-70AT with #882 Standard Field Tripod REFURBISHED ONLY HURRY!! LIMITED STOCK HURRY GOING FAST !! Firstscope 114EQ ONLY ( 2 )AVAILABLE! 10" LX-50 IMAGE STABILIZER BINOCULARS Mail-In REBATES NexStar FREE Starter Kit Order NOW! LXD75 Series LXD75 N-EC LXD75 SN-EC LXD75 SN-EC UHTC LXD75 SN-6AT ... LXD75 AR-6AT Starts Shipping End of June 2004 NOW AVAILABLE Meade Sky Assurance Meade's NEW 3 year and 5 year Extended Service Plans ORDER NOW!! STARHOPPER Dobsonians Return Policy CLOSED - Sundays We Have Been In The Same Location to Serve You for Over 50 Years 5348 Topanga Canyon Blvd, Woodland Hills, CA 91364 Phone (818) 347-2270 / Fax ( 818) 992-4486 Or TOLL-FREE at (888) 427-8766 Will only honor current page prices!

51. Venus Transit Sun Telescope Losmandy Mounts Toucam Philips Green Laser Lazer venus transit sun telescopes losmandy mounts sky use, green laser, lazer, telescope information, toucam, philips, telescope making, astronomy services, Tasco http://www.telescopes-astronomy.com.au/

venus transit sun venus transit sun venus transit sun venus transit sun 10 YEAR CELEBRATIONS Established May 1st 1994 Search This Site for OR USE OUR SITE MAP PHILIPS ToUcam 840k $198AUD$ or $125US$ or £70 STELLACAM EX ASTRO CCD 0.00005 Lux 1/60th to 2 sec Scan Rate $1190AUD$ or £465 Losmandy Gemini G11 Sweet Dreams are made of this $4950AUD$ or £1920 CELESTRON 25x100mm BINOCULARS "Excellent Viewing! - Society Members" $699AUD$ or $399US$ or £279 13x70mm BINOCULARS "Good Reviews From Society Members Night" $150AUD$ or $110US$ or £60 GREEN LASER POINTERS 5mW Class IIIa Doesn't Fade or Chew Batteries Dot Range 4kms $160AUD$ or $105US$ or £68 102mm Refractor F/10 Equatorial Mount Good Reviews 2" Focuser $699AUD$ or $440US$ or £269 TELESCOPES ASTRONOMY CONTENTS VENUS TRANSITS ... Philips ToUcam Pro - New stock at reduced prices! TELESCOPE CONSTRUCTION NEW - ACHROMATIC LENSES CURRENT SPECIALS EYEPIECE DEAL - ANY 6 Super Plossl PL4mm Super Plossl PL6.5mm Super Plossl PL10mm Super Plossl PL12.5mm

52. The San Francisco Sidewalk Astronomers Dedicated to taking your telescope to the sidewalk. Also has telescopes for you to borrow for free. San Francisco, California. http://members.aol.com/raycash/sidewalk.htm

After about five years of having this page up, I have abrogated my association with the San Francisco Sidewalk Astronomersmainly because I don't physically go out to the sidewalk anymore with my telescope(s). . . However, in this virtual world, I still encourage others to do so: it's a great way to 'share the universe' (and your enthusiasm!), especially if your temperament is at all outgoing. . . This page will continue to have some "sidewalk-like" articles beneath its cover, but it will also be geared to the average astro-interested beginner. For official SF Sidewalk Astronomer information, go to: Morris Jones' San Francisco Sidewalk Astronomers' Webpage ... Or call the SFSA "hotline" for the latest scheduled get together: (415) 289-2007. Make Your Own Telescope What is Sidewalk Astronomy? by Douglas Wolfe Before you go out to the sidewalk . . . I Am New to Astronomy, Where do I start? Who Is John Dobson? Sidewalk Astronomer Communities and Websites ... email Ray Cash To my other Webpages: My Vanity Page How to Build a Dobsonian Telescope Astro-images ... of a 13" "Travelscope"

53. Telescopes.ru These telescopes feature solid performance and high qualitative optics at an attractive price. So take your choice. TAL telescopes. http://www.telescopes.ru/

/ Production of the Novosibirsk Instrument-making Plant / You are welcome! High level of skill in the optic producing, that was achived in "cold war" years in USSR, now serves for the production of first-class telescopes. These telescopes feature solid performance and high qualitative optics at an attractive price. Now they are well-known to amateurs astronomers in Europe and America. Distinctive optics of the big military binoculars find a peaceful use now. They are applied as for sky reviews and comets searching and for terrain observations. Another equipment like night vision devices and telescopic sights are intended for hunters, sportsmen and quards. There are measuring microscopes and projection instruments, index heads, autocollimators, optical inclimeters, optical benches, linear displacement transducers for NC machines, optics for machines, medical and veterinary instruments also.

54. Astromart - Your Global Astronomy Resource Everything for the astronomer, including telescopes, mounts, eyepieces, filters, telescopemaking tools and other equipment. http://www.astromart.com/

Log In Help Terms of Service Astronomy Links ... Supporters User Name: Password: Save Login New to Astromart? Register an account... From the ATWB Customer Gallery ‚j‚‰‚Ž‚‡‚†‚‰‚“‚ˆ‚ ‚’ By: ikuo takamura Welcome to Astromart! Friday, June 11, 2004 Shipping something? Posted by Paul Walsh on 6/11/2004 Today's big news is about something right here on AstroMart. Read full story 2 Comments... Thursday, June 10, 2004 Space Laboratory on a Chip? Posted by Paul Walsh on 6/10/2004 NASA researchers customize "lab-on-a-chip" technology to help protect future space explorers and detect life forms on Mars... Read full story 0 Comments... Wednesday, June 09, 2004 Venus Blocks the Sun Posted by Paul Walsh on 6/9/2004 Well not quite. Unless you were off-world today, you probably caught the news about the Venus Transit... Read full story 0 Comments... Tuesday, June 08, 2004 Another Week, Another Winner! Posted by Paul Walsh on 6/8/2004 So many cool reviews to choose from - and more coming all the time... This week's winner is... Read full story 0 Comments...

55. Telescopes telescopes. Russian TAL telescopes 100mm, f/10 achromatic refractor TAL100R (TAL-100RM), small telescope for amateur astronomers. Modified Maksutov-Cassegrain http://www.telescopes.ru/product.html?cat=1

56. Omni-Optical For All Your Optical Needs Optical science, prisms, illusions, fiber optics, microscope, telescopes, optical science activity kits, magnifiers and binoculars are a few of the items offered. http://www.omni-optical.com

Optical Science Micro-World Magnifiers Telescopes Welcome to OMNI-OPTICAL.COM An extensive offering of everything dealing with Optics. Optical Science Curious about how microscopes work? Want to experiment with lens and prisms? Then you will enjoy this department. Magnifiers There are many times that a microscope provides too much magnification. Here you will find a broad array of magnifiers that are useful for many things. Micro-World An exciting world of its own. Today microscopes are used in everything from forensics to geology. This department offers a wide range of Microscopes, all the Supplies you'll ever need and an extensive array of Specimen Sets. Everything you need to get started with the Microslide System, widely used educators. Telescopes Search the world beyond our atmosphere. Feenixx Web-Shops.net stores: Anatomy-Resources.com Arthropod.net Astronomers.net Aviation-Central.com ... Science-Store.com

57. KECK Mirror At Caltech Astronomy Thank you for visiting the mirror site for KECK telescopes at Caltech Astronomy. We no longer maintain this mirror. Please visit http://www.astro.caltech.edu/mirror/keck/

Thank you for visiting the mirror site for KECK Telescopes at Caltech Astronomy. We no longer maintain this mirror. Please visit the actual site http://www2.keck.hawaii.edu and update your bookmarks. Your browser should take you there automatically in a few seconds.

58. Telescopes In Education (TIE) Provides images taken by the telescope, an Observatory Cam, along with a calendar of current events, and weather information. http://tie.jpl.nasa.gov/tie/index.html

59. Computer Operated Telescopes Computer Operated telescopes. by Mel Bartels. http://www.bbastrodesigns.com/cot/cot.html

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

60. COMPOSITE TELESCOPES Carbon, Aramid and Sglass/epoxy composite tubes. Descriptive intro to composites. http://www.dreamscopes.com

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