Astronomy

Written by an accomplished amateur astronomer and available for the first time in North America, this advanced guide is designed to take your evening explorations to new heights. Beginning with an explanation of the fundamental principles of practical astronomy, author North provides essential information on telescope optics, the atmosphere, astrophotography, electronic imaging, and telescope hardware (including how to select equipment and diagnose faulty telescopes). This knowledge is then applied to the full range of celestial bodies accessible by telescope: the solar system, stars and galaxies. For those amateur astronomers who are bored with making simple observations, chapters on photometry, spectroscopy and radio astronomy bring observational astronomy to a level where data of real scientific value can be acquired. This book is a must for any amateur astronomer wanting a new way to look at the sky.

CROATIA Space Astronomy Round odd shaped semi-circular stamps setenant 2v commemorating International Year of Astronomy. Fine MNH pair. 

BULGARIA Space Astronomy 50th Anniversary Yuri Gagarin Spacecraft Astronaut and first spacecraft to Venus Commemorative   Miniature sheet MNH fine condition.

Great Britain Astronomy Souvenir Sheet First Day Cover SGMS   PAYMENT SHOULD BE MADE WITHIN 7 DAYS. OTHERWISE PLEASE DO NOT BID. I WILL CANCEL TRANSACTION IF PAYMENT IS NOT RECEIVED IN 10 DAYS AND RE-LIST ITEMS. STAMPS FOR THE SERIOUS PHILATELIST. PLEASE NOTE THAT I WILL MAIL STAMPS EVEN IF DELAYED AND WILL NEVER CANCEL ANY SALE AFTER THE AUCTION IS OVER. NO RESERVE- WHATEVER THE END PRICE IS THE FINAL PRICE. Thanks for looking at my auctions. I am a serious stamp collector and I am selling all my excess stamps. Some of the stamps come from very old collections. FEEDBACKS- I believe

TO INCREASE CHILDS INTELLECTUAL CREATIVITY AND IMAGINATIVE ABILITY THIS IS THE ONE MOST IMPORTANT THING TO BE GIVEN ALSO THE LARGER THE OBJECTIVE THE MORE LIGHT THE TELESCOPE COLLECTS AND FINER DETAILS IT RESOLVES. COATING OF GLASS OPTICS AND COVERED IN RUBBER FOR EASY HANDLING.GREAT INSTRUMENT FOR SPORT EVENTS BIRD WATCHING OR SIMPLY GAZING AT THE EVENING STARS. UNIT ONE WILL BE SENT

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. Brand:                 Galileo Type:                     Refractor Diameter:             60mm Focal Length:      700mm Description: “...I propose great things for inspection and contemplation by every explorer of Nature,” wrote the famous astronomer Galileo Galilei in 1610 after probing the heavens with his crude, self-made telescope. Those “great things” he mentioned are still up there, ready for today’s budding astronomers young and old to inspect and contemplate. You can see them for yourself with Our Skyview III, which, believe it or not, is a far more capable telescope than Galileo ever had!  The Skyview III is a classic refractor with precision glass optics and great portability. It’s a complete backyard telescope package that includes the optical tube, all accessories, and tripod.  The Sights You’ll See: You’ll be surprised at the celestial sights you can see with Skyview III. Saturn and its rings, Jupiter and its dancing moons, and the changing phases of Venus, for starters. Close-up views of the Moon’s rocky, cratered surface. The contrasting blue and gold gems of the double star Albireo. And dozens of “deep-sky” gems, including the magnificent Orion Nebula and the glittering Pleiades and Beehive star clusters.  Everything You Need To Begin Stargazing! The economical precision optics of the Skyview III reveals Moon craters, rings of Saturn, star clusters, and more. Fun and easy to use for kids and adults! The Skyview III telescope offers higher quality and more reliable performance than department store refractors. Ours features weather resist PVC tube and all-glass optics, including a fully coated 60mm achromatic objective lens for crisp, bright images. It comes with three eyepieces: quality 20mm, 12.5mm, 4mm  lens gives you a magnification of Upto 525x  With 3x Barlow provided. To top it all, there is a finder scope with cross hair to help you locate your targets. A sturdy mount with heavy duty tripod gives you steady images without any vibrations. Light weight, Weather resists. Its small, compact size makes it an excellent companion for kids and adults alike.  The Skyview III comes on an altazimuth mount. The altazimuth mount is lightweight, and easy to operate.   Following items comes along with the scope:- A 60mm Refractor  Achromatic lens assembly tube.  Eyepieces 20mm, 12.5mm, 4mm 90 degree Star diagonal. Advanced Rack & Pinion Focusing system. 3x Barlow Dust covers for main tube & eyepieces. Heavy duty Metal Tripod with Altazimuth mount. Finder Telescope mounted on the tube. Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. Gallileo 7x25 Star Finder Telescope  A  Finderscope  is a small auxiliary telescope mounted atop the main astronomical telescope and points in the same direction. Finder usually has a smaller magnification then the main telescope can provide and therefore can see more of them sky. This helps in locating the desired astronomical object in the sky. Finderscopes usually comes with a designation number like 6x30. Where 6 is the magnification and 30 is the aperture of the finderscopes objective lens in millimeters.  Includes: 25mm achromatic objective, eyepiece to give 7x magnification, crosshairs, focusing mount, unique adjustable mounting bracket with collimation set screws. Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. Brand:                 Celestron Type:                   Reflector Diameter:            130mm Focal Length:      650 mm Description:   Quick Overview The  Celestron AstroMaster 130EQ telescope  is a fast (f/5) Newtonian with 5" of aperture, yielding bright, wide-field views of nebulae, galaxies, star clusters and the planets. The sturdy CG-3 equatorial mount will allow you to follow the movements of objects as they cross the sky and includes slow motion controls on both axis. Includes permanently mounted Star Pointer finderscope, a 10mm 1.25" eyepiece and a 20mm 1.25" erecting eyepiece, pre-assembled tripod, "The Sky - Level 1" software and Two-Year Celestron Warranty.   Celestron AstroMaster 130 EQ Newtonian Reflector Telescope Features... Fully multi-coated optics for bright, crisp, clean images. Quick release dovetail attachment for user-friendly set-up and storage. No tools needed! Permanently mounted StarPointer finderscope projects a red laser dot onto a non-magnified viewing window for easy aiming. German Equatorial Mount with setting circles - to accurately locate and track sky objects. Rugged pre-assembled tripod with 1.25" steel tube legs with deluxe accessory tray for convenient access to observing tools. The Sky Level 1 planetarium software with a 10,000 object database and enhanced images. Specifications   SKU CE-31045 Manufacturer Celestron Telescope Series Celestron AstroMaster Optical Design Newtonian Reflector Mount Type Equatorial - Manual Warranty 2 Year Warranty Telescope Aperture 5.12" Telescope Focal Ratio f/5 Telescope Focal Length 650mm Limiting Stellar Magnitude 13.0 Highest Useful Magnification 307x Optical Coatings Aluminum Tube Color or Finish Gloss Black Optical Tube Outer Diameter Not provided by manufacturer Length of Optical Tube 24" Diagonal Included? No - Not Required Finder Included Red Dot Finder Eyepiece(s) Included 20mm erecting, 10mm Power Adapter Included None - Does Not Require Power CD ROMs Included The Sky Level 1 Case Included? No Counterweights Included (2) 4.8 lbs. Alignment Procedure Manual Alignment Objects in Database N/A OTA Mount Type CG-3 Dovetail Bar Tripod Type Included Adjustable with Steel Legs Total Telescope Weight 28 lbs. Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. Main features: Magnification factor: 4x Lens:  Single Concave 1.25” (32mm) fitting diameter. Fully glasses for excellent image contrast and light transmission. Plastic Dust caps to keep optics dust free when not in use. The  Barlow lens, named for its creator, the English engineer Peter Barlow, is a diverging lens which, used in series with other optics n an optical system, increases the effective focal ratio of an optical system as perceived by all components after it in the system. The practical result is that inserting a Barlow lens magnifies the image dust free when not in use.  In its astronomical use, a  Barlow lens  may be placed immediately before an eyepiece to effectively decrease the eyepieces focal length by the amount of the Barlows divergence.Since the magnification provided by a telescope and eyepiece is equal to the telescopes focal length divided by the eyepieces focal length, this has the effect of increasing the magnification of the image. Astronomical Barlow lenses are rated for the amount of magnification they induce. Most commonly, Barlow lenses are 2x or 3x but adjustable Barlows are also available. The power of an adjustable Barlow lens is changed by adding an extension tube between the Barlow and the eyepiece to increase the magnification. The amount of magnification is one more than the distance between the Barlow lens and the eyepiece lens, when the distance is measured in units of the focal length of the Barlow lens. A standard Barlow lens is housed in a tube that is one Barlow focal-length long, so that a focusing lens inserted into the end of the tube will be separated from the Barlow lens at the other end by one Barlow focal-length, and hence produce a 2x magnification over and above what the eyepiece would have produced alone. If the length of a standard 2x Barlow lens tube is doubled, the lenses are separated by 2 Barlow focal lengths and it becomes a 3x Barlow, if the tube length is tripled, the lenses are separated by 3 Barlow focal lengths and it becomes a 4x Barlow, and so on. A common misconception is that higher magnification equates to a higher-quality image. However, in practice, the quality of the image generally depends on the quality of the optics (lenses) and viewing conditions, not on magnification. Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. Brand:                  Galileo Type:                   Refractor Diameter:            25mm Description: Our classic brass hand telescopes recall the days when the ships that sailed the high seas did, quite literally, sail. Today these expertly handcrafted viewing instruments let you survey ocean-going vessels from the shore or peer in on a distant nest from the porch. Each has glass optics contained in a sectioned tube of polished brass that extends for viewing and collapses for convenient, compact storage. Display it in the den or on living room hearth when not in use, either inside or outside of its genuine mahogany storage chest.   It will get the attention of anyone who sees it!   10x25mm Brass Hand Telescope   The smaller of the two scopes, this one features strong 10x magnifying power and a 25mm objective lens. Sharp focus is achieved by sliding the eyepiece section in or out. Extended length, 14"; collapses to 5.5". Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !    

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. This precision 90° star diagonals feature fully coated mirror, delivering superior image fidelity. It lets you view objects that are at a 90 degree angle from the direction the telescope is pointing, thereby allowing comfortable viewing when the telescope is pointed at, or near, the Zenith (i.e. directly overhead). The resulting image is right side up but will be reversed from left to right. Housings are black - ABS plastic with thumb screws the eyepiece in place.  Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. A T-ring converts a camera's mount to a standard T-thread. All camera adapters will fit this T-thread. Useful accessory allows you to attach a 35mm DSLR or SLR camera to a telescope, camera adapter, and other astrophotography accessories Ring attaches securely to DSLR or SLR camera body and provides a T-thread interface Couples camera body to standard T-thread found on many camera adapters used for astrophotography Securely fits 35mm DSLR and SLR cameras via bayonet-style attachment Made of rugged anodized aluminum Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

Galileo Telescope Makers,   Leaders in Astronomy industry. Largest Astronomy and Telescope company founded and run by Astronomer in India. Galileo Eyepiece adapter 0.965” to 1.25" This great little gadget will upgrade your entry-level.965" (24.5mm) push-fit eyepiece holder to take serious 1.25" eyepieces for vastly improved scope performance. Simply insert the barrel into the eyepiece holder and you are ready to enjoy the splendid views offered by 1.25" eyepieces. Use 1.25" eyepieces with the telescopes that normally use.965" eyepieces. (Normally sold in the departmental stores). Because of additional focus travel needed (1.5" approx.), correct focus may not be achieved on the same small refractor. Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

ESTONIA Estcube First Estonian Satellite Space Aviation Astronomy science Fine Mint never hinged miniature sheet. 

hardly used professional telescope bought from Chennai Astronomy Club 3 years back. Contact for more information.

Buzzers educational CD connected to Science, Astronomy, C language, Anatomy for sale Interested persons can call me on my mobile This CD's are available in Gottigere, Bannerghatta road

Selling my awsome nikon 10x21 sprint IV binoculars.. Its compact and super powerful..nikon is no 1 in cameras and binoculars. Cristal clear views from the lenses of nikon.. It can be used for any purpose like astronomy.. Tours on hill or at beautiful places..Sports watching or watching somebody from your roof or house.. Nice magnification and cristal clear scenes thats my guarantee.. Mrp /- Selling at only . Or can exchange it too.

Selling my superpowerful kenko binoculars.. It is japan optics.. 10 to 30x zooming by just pressing zoom lever.. Bright and HD images.. Very useful for astronomy and long distance viewing Selling at just ..

  Celestron 1.25" Plossl Eyepiece 25mm   1.25 inch 25mm plossl eyepiece, 52 degree apparent field of view Fully multi-coated lenses, 4 lens elements, Blackened lens edges 22mm eye relief, fold-down rubber eyeguard Threaded for standard 1.25" astronomy filters All eyepieces are  multicoated High quality lenses provide the best-possible sharpness Blackened lens edges reduce light scattering and improve contrast Rubber eyecups to keep out stray light Barrel features a safety undercut for added security Comfortable eye relief at all but the shortest focal lengths  Includes two end caps Specifications Eyepiece Series Plossl Focal Length 25mm Barrel Size 1.25" Filter Threads Yes Coatings Multi coated Lens Elements 4 Blackened Lens Edges Yes Optical Design Plossl Field of View 52 Degrees Rubber Eye Guard Yes Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items !

  Celestron 1.25" Plossl Eyepiece 25mm   1.25 inch 25mm plossl eyepiece, 52 degree apparent field of view Fully multi-coated lenses, 4 lens elements, Blackened lens edges 22mm eye relief, fold-down rubber eyeguard Threaded for standard 1.25" astronomy filters All eyepieces are  multicoated High quality lenses provide the best-possible sharpness Blackened lens edges reduce light scattering and improve contrast Rubber eyecups to keep out stray light Barrel features a safety undercut for added security Comfortable eye relief at all but the shortest focal lengths  Includes two end caps Specifications Eyepiece Series Plossl Focal Length 25mm Barrel Size 1.25" Filter Threads Yes Coatings Multi coated Lens Elements 4 Blackened Lens Edges Yes Optical Design Plossl Field of View 52 Degrees Rubber Eye Guard Yes Note: The Specifications and colors may vary due to recent improvements in design. Check out my  other items ! Track Page Views With Auctiva's FREE Counter

Celestron 130 Eq telescope beginners telescope for astronomy and astrophotography. it is a regularly used telescope condition is 9/10. reason for selling upgrading to refractor telescope

"Ideal for the observer who views both astronomical and terrestrial objects the Meade Infinity Series combines an altazimuth mount and quality optics for a superb value. For newcomers and beginners alike these refracting telescopes are a great way for you to discover the cosmos and the outdoors. You rsquo ll discover more with the Meade Infinity Series. If you rsquo ve never owned a telescope before the Infinity 90 Refractor is a great telescope to get started in astronomy. This 90mm (3.5) aperture gives bright sharp images for both land and celestial objects. Whether you re viewing the rings of Saturn polar caps on Mars cloud bands on Jupiter or land objects the Infinity 90 Refractor allows the first-time observer to explore the world solar system and beyond.

With this Binocular, you'll have a bird's-eye view of everything. This binocular has super image quality. The powerful magnification with center-focus system makes viewing simple and easy to adjust. This high definition binoculars telescope is great for yachting, hunting, bird watching, auto racing, horse racing, theater, boating, surveillance and security. Feature: · Great value binoculars for the races, bird watching, outdoor sports and shows, air shows, trips, hunting, hiking, boating, low-light conditions, astronomy and more. · Large objective lens for maximum light transmission · Ruby-coated optics for maximum light and low light conditions · Smooth center focusing for easy using · Rugged, high-quality finish for firm grip · Suitable for: military, sport events, concerts, bird watching, camping, fishing and travel, Outdoor Hunting, tracking, search and rescue.

completely new condition with all accessory ( caring case , neck strap , lance cover) 15x70 is most powerful magnification for astronomy & long distant view

I USED BINOCULAR ONLY ONE MONTH. Original Vivitar 8X21 Super High-Powered Multi-Magnification Long distance Zoom Monoculars. Ideal also for backyard Astronomy. Day and Night Vision. Huge distances jump forward at the flick of the finger. Power x Obj. 8X21. Size Class Standard. Focus System InstaFocus. Prism System. Eyecups Fold Down.

Discover our solar system with the Celestron AstroMaster 130AZ! You'll be ready to observe in minutes thanks to the quick and easy no-tool setup. The AstroMaster 130AZ provides bright, clear images of the Moon, planets, star clusters, and more for great nighttime viewing. Plus, this dual-purpose telescope with erect image optics can also be used during the day. You'll enjoy viewing lakes, mountain ranges and wildlife by day, then stargazing at night. Two quality eyepieces Permanently mounted StarPointer red dot finderscope "TheSkyX: First Light Edition" astronomy software with 10,000-object database to help you learn about the universe Quick and easy no-tool setup with quick- release dovetail attachment Erect image optics, ideal for terrestrial and astronomical use Altazimuth mount makes it easy to point the telescope at targets Large 130 mm Newtonian reflector-style optical tube Rugged pre-assembled tripod with 1.25" steel tube legs and deluxe accessory tray Coated all-glass mirrors for clear, crisp images Dimensions (L x W x H): 106.7 cm x 106.7 cm x 137.2 cm (42 in. x 18.5 in. x 54 in.) Weight: 12.7 kg (28 lb)