 | Why telescope eyepieces get greasy/dirty and how to clean them. | Views: 7088  25 ratings |
| Time: 08:36 | More in Education |
Wednesday, September 12, 2012
How To Clean Eyepieces
refractor telescopes video
refractor-telescopes
Wednesday, September 5, 2012
Features of the Orion ShortTube 80 Refractor Telescope Optical Tube Assembly
refractor telescopes video
refractor-telescopes
 | Visit www.telescope.com tofind high quality products for amateur astronomers. If you have any questions about any of our telescopes, binoculars, or accessories, please don't hesitate to contact one of our trained and knowledgeable customer service representatives. http To learn more about Astronomy, please visit Orion Resource Center where you can find Articles, Images, Videos and More! www.telescope.com Since 1975 Orion Telescopes & Binoculars has been offering telescopes for sale direct to customers, with an unswerving commitment to best quality products, value and unmatched customer care. Our 100% satisfaction guarantee says it all. Orion offers telescopes for every level: Beginner, Intermediate, Advanced, and Expert. From our entry level beginner telescopes for amateur astronomers to our Dobsonian telescopes to our most advanced Cassegrain telescopes and accessories, you can find the best telescope for you. | Views: 185  6 ratings |
| Time: 01:12 | More in Science & Technology |
Tuesday, September 4, 2012
Teach Astronomy - Reflecting Telescopes
refractor telescopes video
refractor-telescopes
 | www.teachastronomy.com Essentially all modern telescopes used by research astronomers are reflecting telescopes. They use mirrors to bend, deflect, and focus light to form an image. The first reflecting telescope was perfected by Isaac Newton, and reflecting telescopes of larger and larger aperture have been produced ever since. Edwin Hubble discovered the distant nature of galaxies and the expansion of the universe using the largest reflecting telescope at the time just outside Los Angeles. For several decades the largest reflector was the 200-inch or 5-meter diameter telescope at Mount Palomar. The Russians built a 6-meter telescope in the 1970s. Currently the largest single mirror telescopes are just over 8-meters in diameter. The advantage of a reflecting telescope relative to a refractor is that the mirror can be very large and thin because the light is only reflected from the front surface. A reflector also reflects all the waves of light by equal amounts, and so the images that are formed have no chromatic aberration. The two slight disadvantages of reflecting telescopes are that the mirror's surface is exposed to the elements and must be occasionally recoated and the fact that since the light is focused in front of the mirror, some of the light must be blocked by a secondary or by a detector to gather the light. | Views: 30 0 ratings |
| Time: 01:33 | More in Education |
New Space Telescope Has Mirrors of Gold | NASA JWST James Webb Near Infrared HD Video
reflecting telescopes video
reflecting-telescopes
 | Visit my website at www.junglejoel.com - in order to better reflect infrared light, the James Webb space telescope mirrors are coated in 24k gold. Please rate and comment, thanks! Credit NASA GSFC Quantum Coating | Views: 548 12 ratings |
| Time: 03:49 | More in Science & Technology |
Sunday, September 2, 2012
Historic Lick Observatory, A Video Tour | Mount Hamilton, San Jose; California Astronomy HD Video
refractor telescopes video
refractor-telescopes
 | Visit my website at www.junglejoel.com - Lick Observatory features the famous 36 inch Lick Refractor, built during the golden age of refractor telescopes -and one of the largest refractors ever built. Down the road is the more modern automated Terrestrial Planet Finder telescope, as well as the giant 120 inch Shane Telescope. Please rate and comment, thanks! | Views: 115 5 ratings |
| Time: 05:55 | More in Science & Technology |
The Shane Telescope - Lick Observatory, Mount Hamilton California Astronomy HD Video
refractor telescopes video
refractor-telescopes
 | Visit my website at www.junglejoel.com - Lick Observatory features several large, noteworthy telescopes, including the giant 120 inch Shane. Please rate and comment, thanks! | Views: 85 2 ratings |
| Time: 04:43 | More in Science & Technology |
Friday, August 31, 2012
Galileo and 400 Years of Telescopic Astronomy - book launch talk - PART 1
reflecting telescopes video
reflecting-telescopes
 | A fascinating talk by one of the authors about the astronomy book Galileo and 400 Years of Telescopic Astronomy by Peter Grego and David Mannion. Dr. Mannion gives an impassioned and absorbing account of the history of astronomy, scientific advances and how the use of the telescope changed our world - and indeed universal - view forever. The talk was filmed in Waterstones, Canterbury at the book launch there. Our kind gratitude to Waterstones and all the staff who helped facilitate a wonderful evening. | Views: 847 7 ratings |
| Time: 12:34 | More in Science & Technology |
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