Best Theoretical Astronomy Ebooks

Celestron Omni XLT 120 Reflector Telescope

  • CELESTRON’S LEGENDARY OMNI XLT REFRACTOR OPTICAL TUBE: Celestron technicians hand select the glass for each lens in your Omni XLT refractor so only the finest grade optical glass is used..
  • STARBRIGHT XLT OPTICAL COATINGS: Every air-to-glass surface in the Omni XLT’s optical path is fully multi-coated with our proprietary StarBright XLT anti-reflective coatings for the maximum level of light transmission to the eye..
  • ULTRA-PRECISE GERMAN EQUATORIAL MOUNT: Celestron CG-4 manual EQ mount with setting circles, worm gear slow-motion controls and ball bearings on both axes..
  • ACCESSORIES INCLUDED: Everything you need to begin observing immediately—6x30 optical finderscope, sturdy full-height steel tripod with 1.75” legs, 1.25” star diagonal, and a 25mm multicoated eyepiece..
  • BONUS ASTRONOMY SOFTWARE: Learn more about the night sky with your FREE download of Starry Night, one of the top consumer rated astronomy software programs with a database of more than 36,000 celestial objects and printable sky maps..
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SCOKC Binoculars 30x80 Tenjin Astro Astronomy Binoculars with EVA Carrying Case Powerful Binoculars BAK4 Waterproof

  • POWERFUL 30X MAGNIFICATION: With our enhanced Tenjin30x80, you get massive 80mm objective lenses, This Tenjin is ideal for those who love astronomy....
  • INCLUDES TRIPOD ADAPTER: As an additional convenience to your sky-watching activities, our 80mm Tenjin powerful binoculars include an integrated photo....
  • BRIGHT, SHARP VIEWING AND BaK-4 PRISM: The Tenjin is a favorite among those who view in dim conditions near dawn and dusk or for astronomy purposes.....
  • DURABLE AND WATER-RESISTANT: The sturdy aluminum alloy body provides protection and prevents rubber oxidation, which can ensure the durability of the....
  • STRONG PROTECTION: Use double-layer EVA material to make a sturdy protective box to avoid breaking it during transportation..
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Text to Speech Software Audio Reader XL American 2022 - $19.95 - Text to Speech Reader for Windows PC - The Text Reader is very easy to use

  • Text to Speech Software (American) - Text to Voice Reader - TTS Reader - Very easy to use Text to Speech Software.
  • Voice aloud Reader with good American voices to read text aloud or converting text to MP3 and Text to Speech with the Text to Speech Reader.
  • Read any kind of text format such as Word, PDF, eBooks, EPUB, TXT, RTF, HTML, Webpages etc. with the Text to Speech Software.
  • Works in the background on demand and reads texts automatically - Text to Speech Software starts with Windows on demand.
  • Text to Speech with project management to manage texts and eBooks - Comprehensive filters to filter unwanted texts such as headlines, footnotes, notes....
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QQJOY Telescope, 90mm Aperture Telescopes for Adults Astronomy, Telescope for Kids 8-12, 600mm Refracting Telescope (24X-300X) with Tripod,Bag,3pcs Eyepieces,Barlow Lens,Phone Adapter,Wireless Remote

  • The telescopes with 600mm long focal length can see farther than other short. It can clearly observe Jupiter's cloud belts & the Great Red Spot, Saturn's rings & the gaps between Saturn's rings & the body,craters of the moon, etc.Therefore, it is also very suitable as telescopes for adults astronomy.
  • The telescope refractors is simpler to install & easier to use than reflector telescopes, It is also suitable as a telescope for kids 8-12 & astronomy gifts,Because it not needful for professional knowledge & cumbersome installation & debugging like a reflector..
  • Rich accessories, including:1.Mobile phone holder and remote control for shooting 2.Horizontal & vertical adjustable stainless steel tripod 3.3x Barlow Lens 4.Red Dot Finderscope 5.portable bag. the telescope for kids is easy to aim at the target & shoot the stars without shaking,The kids telescope has 24x to 300x magnification.
  • As a professional astronomical telescope manufacturing team composed of senior astronomy enthusiasts, if you have any questions, we will provide reply and service within 24 hours. If there is a quality problem within one year, we will exchange a new one for you. Please note, do not look directly at the sun with the telescope, it may damage the eyes....
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Sony PRS-T2 6\ Touchscreen Digital eBook Reader w/E-Ink Technology, Built-in Wi-Fi & microSD Card Slot (Black)

  • In the Box - USB Cable, Stylus Pen, Quick Start(TM) Guide, WarrantyFeatures.
  • World's lightest 6 eReader - Weighing less than 6 ounces, the lightest 6 eReader around is no bigger than an average paperback. This slim, 0.38 inch device has an elegant curved profile for easy holding and carrying in a pocket or bag..
  • Natural reading experience - Enjoy a natural reading experience with smooth page transitions and less flickering..
  • Public library downloads from the device over Wi-Fi - Borrow free eBooks from your local public library using the dedicated public library icon and a Wi-Fi connection..
  • Wi-Fi access to Sony Reader Store - Shop thousands of eBooks, newspapers, and magazines at Reader Store, and discover your next story with new recommendations each week..
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Baomain Pneumatic Air Cylinder SC 125-300 PT 1/2; Bore: 5\

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Baomain Pneumatic Air Cylinder SC 100 x 75 PT 1/2; Bore: 4\

  • Package Content: Cylinder + 4 PCS Fittings.
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Baomain Pneumatic Air Cylinder SC 100 x 200 PT1/2; Bore: 4\

  • Port size: PT1/2, Bore: 100mm, Stroke: 200mm.
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Baomain Pneumatic Air Cylinder SC 100 x 300 PT1/2; Bore: 4\

  • Port size: PT1/2, Bore: 100mm, Stroke: 300mm.
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Baomain Pneumatic Air Cylinder SC 125 x 200 PT 1/2; Bore: 5\

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