![]() These are expanding shells of gas expelled from a star late in its life. Planetary Nebulae: Sets whether planetary nebulae are displayed in the sky chart. Examples are B 33 (the Horsehead Nebula) in Orion, and the Coal Sack in Crux. They are mostly located along the Milky Way. These are opaque clouds of cold dust which obscure the light from the stars behind them. Examples are M 42 (the Great Orion Nebula) in Orion and M 20 (the Trifid Nebula) in Sagittarius.ĭark Nebulae: Sets whether dark nebulae are displayed in the sky chart. These nebulae glow either from the reflection of light from nearby stars or from the emission of light produced by nearby stars heating the nebulae. These are glowing clouds of gas usually found in the disk of the Milky Way. Examples are M 13 in Hercules and M 22 in Sagittarius.īright Nebulae: Sets whether bright nebulae are displayed in the sky chart. These massive clusters are among the oldest objects in our galaxy. These are dense concentrations of stars, typically containing tens of thousands to millions of stars. Globular Clusters: Sets whether globular clusters are displayed in the sky chart. Please Note: this section is only available in SkySafari Plus and Pro. At 80%, the brightest 80% of deep sky objects have names shown. ![]() At 0%, no objects have names shown at 100%, all objects have names shown. Name Density: Sets the percentage of deep sky objects whose names are displayed on the sky chart. When turned off, deep sky objects names are always shown using catalog numbers (e.g. Proper Names: Sets whether proper names are displayed for deep sky objects, when possible. Show Names: Sets whether deep sky objects' names are displayed next to the objects in the sky chart. Move the slider to vary the brightness from 0% (black) to 100% (white). Intensity: Sets the brightness used to display deep sky object symbols and names. When zoomed in, fainter objects are displayed. The magnitude limit will change automatically as you zoom the sky chart in and out. The brighter an object, the lower its magnitude. This determines the faintest deep sky objects that are visible in the sky chart. Magnitude Limit: Sets the deep sky object magnitude limit. Please Note: this feature is only available in SkySafari Plus and Pro. However, turning this option on may let you see the distribution of (for example) galaxies across wide areas of the sky. This option is turned off by default, since deep sky objects can only be seen through binoculars or telescopes, which have very small fields of view. Show in Wide Fields: allows deep sky objects to be displayed when the field of view is wider than 45 degrees. Please Note: this feature is only available in the SkySafari Plus and Pro. Together, the Messier and Caldwell lists include most of the deep sky objects easily visible in backyard telescopes from both hemispheres. It includes additional 110 "Messier-quality" deep sky objects which Messier missed, many because they are only observable from the southern hemisphere. The Caldwell Catalog is a modern complement to Messier's list, compiled in 1995 by the British astronomer Patrick Caldwell-Moore. The Messier catalog includes some of the most prominent star clusters, nebulae, and galaxies visible from the northern hemisphere, such as the Hercules Cluster (M 13) and the Whirlpool Galaxy (M 51). ![]() The Messier Catalog is a famous list of 110 prominent deep sky objects compiled by the 18th century astronomer Charles Messier. These objects include the Messier objects, the Caldwell objects, and any other deep sky objects with a proper or common name. Deep sky images can be displayed independently of deep sky object symbols (above), and vice-versa.īest-Known Only: Sets whether only the best-known deep sky objects are shown in the sky chart. When turned on, Digitized Sky Survey images of several hundred best-known deep sky objects are drawn at their true size and orientation in the sky chart. Show Images: Displays images of deep sky objects in the sky chart. When turned off, most of the other settings in this view are disabled. Show Objects: Draws symbols for star clusters, nebulae, and galaxies in the sky chart. The settings in this view let you control the display of star cluster, nebulae, and galaxies - including the selection of deep sky objects that are shown, and the labelling of objects with their names or catalog numbers. ![]()
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