![]() ![]() Use direct vision where color perception and resolution are important, and averted vision (looking slightly to one side of the object) for seeing faint details. The Pleiades (Messier 45) in Taurus is a fine example of an open star cluster and a deep sky object to observe. All deep-sky objects are at their best when on or near the meridian and, therefore, highest in the sky. Close doubles and tight clusters (especially globulars) are best seen on nights of steady seeing, while nebulae and galaxies should be saved for nights when transparency is excellent. While low magnifications and wide fields of view are typically used for finding deep sky objects, higher magnification has the benefit of darkening the background sky - something to keep in mind when you're looking through light pollution. Deep Sky Observing TipsĪ few observing hints are in order. In fact, many of these hidden treasures appear on Sky & Telescope's monthly centerfold star map. You can readily find all of them within their respective constellations using a good star atlas such as Sky Atlas 2000.0, and the vast majority are plotted in more basic atlases and on detailed star maps. Nebulae and galaxies are still well represented even though these faint fuzzies suffer the most from light pollution. ![]() Since stars have the highest per-unit-area brightness, double and multiple stars and bright star clusters dominate the selection. Presented here is a table of 111 deep sky showpieces scattered around the heavens, most of them visible from midnorthern latitudes through even the brightest of skies. The Orion Nebula (Messier 42) is the brightest emission nebula visible from midnorthern latitudes. ![]()
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