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25 × 150 binoculars adapted for astronomical use. Binoculars are widely used by amateur astronomers; their wide field of view makes them useful for comet and supernova seeking (giant binoculars) and general observation (portable binoculars).
While you don’t always need special gadgets to watch celestial events light up the sky, telescopes and binoculars allow you to get a better look at space-related phenomena. The summer is filled ...
Name Image Effective aperture m Aper. in Mirror type Nationality / Sponsors Site Built Large Binocular Telescope (LBT): 11.9 m (8.4 m×2) 330" × 2: Multiple mirror, 2
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When the two mirrors are on one mount, the combined mirror spacing of the Large Binocular Telescope (22.8 m) allows fuller use of the aperture synthesis. Largest does not always equate to being the best telescopes, and overall light gathering power of the optical system can be a poor measure of a telescope's performance.
Visible to the naked eye in dark skies, [4] [5] it is best observed with binoculars or a small telescope, and a 12-inch aperture telescope will reveal about 250 stars. [ 3 ] [ 6 ] Discovered by James Dunlop in 1826, it has been described by John Herschel as "a most superbly rich and large cluster" and by Stephen James O'Meara as "one of the sky ...
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