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.
Note: The Cosmos 90GT Wi-Fi telescope requires power and a
compatible smartphone or tablet to operate. There are no manual controls on
the unit. See below for power requirements
and compatible devices.
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
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.
- 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"