Features

Overview: The Cosmos 90GT Wi-Fi telescope by Celestron is the first 100% Wi-Fi-operated telescope for amateur astronomy. You can control the telescope using the free Cosmos Celestron Navigator app with your iPhone, iPad, or Android smart device. The Cosmos 90GT creates its own wireless connection, so it can communicate with your device in locations where Wi-Fi or cellular networks are not available. The telescope comes with two eyepieces, a StarPointer finderscope, a Cosmic Calendar poster, and a tripod with accessory tray for holding your smartphone or tablet.

StarPointer Finderscope: The telescope comes with a StarPointer red-dot finderscope which helps you to aim the telescope at a distant target. The finderscope must first be aligned with the telescope before use.

Kellner Eyepieces: The Cosmos 90GT features two Kellner eyepieces: a low power 25mm and a high power 10mm. You can choose which eyepiece to use based on the magnification and field of view you desire. It is recommended that you use the 25mm eyepiece when first setting up and aiming the telescope, then switch to the higher power 10mm eyepiece to get a closer look at the object.

Star Diagonal: The included star diagonal positions the eyepiece at a more comfortable 90° angle to the telescope. Because the telescope is designed for astronomical use, the image is inverted. You can use the telescope without the star diagonal, if desired, by simply installing the eyepiece directly to the focuser.

Accessory Tray: The telescope comes with an accessory tray which provides storage of extra eyepieces, as well as a rubber-lined tray for your smartphone or a small tablet.

SkyAlign Technology: During setup, Celestron's SkyAlign technology can quickly and simply align the telescope. By pointing the telescope at three bright objects in the sky, and entering date, time, and your location on the app, the telescope automatically and accurately aligns itself.

Power Requirements: The Cosmos 90GT requires a power source in order to operate. It comes with a battery holder for 8 "AA" batteries (batteries not included). You can also use the optional Celestron PowerTank, or a 12-volt DC source with at least 1 ampere of current to power the unit.

Cosmos Navigator App: To get the most out of your 90GT Wi-Fi telescope, you will need to download the Cosmos Navigator App from the iTunes App Store or Google Play. The app has a database of over 120,000 celestial objects, and helps you to locate planets, stars, and galaxies, plus asteroids, comets, and satellites, including the International Space Station. The app can simulate the night sky and create a custom list of visible objects based on your exact time and location. When paired to the telescope via Wi-Fi, you can hold up your device and identify objects instantly. If you tap the object on your device, the telescope will automatically locate and center the object in the eyepiece. You can also move the telescope up/down, left/right with the app on your smart device. The Cosmos Navigator app is compatible with iPhone, iPad, and iPod touch with iOS 7 or later, as well as Android devices with the Android OS Version 4.0 and up.

Cosmos: A Spacetime Odyssey: The telescope's graphics are inspired by the TV series Cosmos: A Spacetime Odyssey, which aired in the spring of 2014. The fork arm has a three-dimensional "Spaceship of the Imagination" (SOTI) design with LEDs that illuminate when the unit is connected via Wi-Fi. The Cosmo series "eye nebula" logo can be found on the refractor tube. A Cosmic Calendar wall poster with images from the TV series is also included.

Specifications:

• Optical Design: Refractor
• Aperture: 90mm (3.54")
• Focal Length: 910mm (36")
• Focal Ratio: f/10.1
• Eyepiece Focal Length: 10mm and 25mm
• Eyepiece Magnification: 36x and 91x
• Highest Useful Magnification: 213x
• Lowest Useful Magnification: 13x
• Optical Tube Length: 39.2"
• Light Gathering Power: 165x (compared to human eye)
• Weight (with tripod): 14.2 pounds
• Overall Dimensions:
  • Length: 37.25" (including eyepiece)
  • Maximum Height (on tripod): 56.375"
  • Minimum Height (on tripod): 36.375"