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The Messier catalogue is one of the most famous lists of astronomical objects, and many objects on the list are still referenced by their Messier numbers. [1] The catalogue includes most of the astronomical deep-sky objects that can be easily observed from Earth's Northern Hemisphere ; many Messier objects are popular targets for amateur ...
At its brightness of visual magnitude 7.5 and diameter of about 8 arcminutes, it is easily visible in binoculars [4] and is a popular observing target in amateur telescopes. The Dumbbell Nebula appears shaped like a prolate spheroid and is viewed from our perspective along the plane of its equator.
many Messier objects and globular clusters are naked-eye objects; M33 is easily seen with naked eye; limiting magnitude with 12.5" reflector is 16.5; 3 Rural sky 6.6–7.0 21.3–21.6 the zodiacal light is striking in spring and autumn, and color is still visible; some light pollution evident at the horizon
Messier 7 or M7, also designated NGC 6475 and sometimes known as the Ptolemy Cluster, [4] is an open cluster of stars in the constellation of Scorpius. The cluster is easily detectable with the naked eye , close to the "stinger" of Scorpius.
Dark sky image with some objects around Pinwheel Galaxy (M 101). The quarter in the lower right shows the tail of Ursa Major with the stars Mizar, Alcor and Alkaid.. The Pinwheel Galaxy (also known as Messier 101, M101 or NGC 5457) is a face-on, unbarred, and counterclockwise spiral galaxy located 21 million light-years (6.4 megaparsecs) [5] from Earth in the constellation Ursa Major.
Messier 10 or M10 (also designated NGC 6254) is a globular cluster of stars in the equatorial constellation of Ophiuchus. The object was discovered by the French astronomer Charles Messier on May 29, 1764, who cataloged it as number 10 in his catalogue and described it as a " nebula without stars".
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The Sombrero Galaxy is 11.5° west of Spica [10] and 5.5° north-east of Eta Corvi. [38] Although it is visible with 7×35 binoculars or a 4-inch (100 mm) amateur telescope, [38] an 8-inch (200 mm) telescope is needed to distinguish the bulge from the disk, [10] and a 10- or 12-inch (250 or 300 mm) telescope to see the dark dust lane. [10]