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Mounts designed specifically for telescopes usually forgo the single-screw attachment blocks in favour of larger, more robust rings or plates. Be aware that a tripod that’s good enough for taking your family snapshots may not be steady enough for astronomy. Many telescopes come conveniently packaged with tripods or mounts (see our Telescope Kits). Your telescope will need something sturdy to support it. Or, more precisely, they do stand still, but they appear to move across the sky as Earth rotates underneath you. Celestial objects don’t stand still for you to look at. Allow the telescope to move extremely smoothly.Keep the telescope from shaking – at high power, every little wobble or vibration is magnified so much that the whole image can become un-viewable.Hellostronomers consider their telescope’s mount to be equally as important as the telescope/optical tube – and sometimes spend more money on the mount than what is sitting on top of it. And regardless of how bright or dark your skies are, the view through a telescope with plenty of aperture is more impressive than the view of the same object through a smaller scope. But you’d probably need a 6- or 8-inch telescope to see those same galaxies from a typical suburban backyard. For example, from a dark location you can spot dozens of galaxies beyond our own Milky Way through a scope with an aperture of 80 mm (3.1 inches). But a good small scope can still show you plenty - especially if you live far from city lights. As a rule of thumb, your telescope should have at least 2.8 inches (70 mm) aperture - and preferably more.Ī larger aperture lets you see fainter objects and finer detail than a smaller one can. The aperture’s diameter (D) will be expressed either in millimeters or, less commonly, in inches (1 inch equals 25.4 mm). Look for the telescope’s specifications near its focuser, at the front of the tube, or on the box. The most important characteristic of a telescope is its aperture - the diameter of its light-gathering lens or mirror, often called the objective.