Messier 22 (M22) is a globular cluster located near the Milky Way bulge, the tightly packed group of stars near the galactic centre. The cluster lies in the constellation Sagittarius. It is one of the brightest globular clusters in the sky and was one of the first objects of this kind to be discovered and studied.
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Messier 21 (M21) is an open cluster located in the southern constellation Sagittarius. It has an apparent magnitude of 6.5. The cluster lies at an approximate distance of 4,250 light years from Earth. Its designation in the New General Catalogue is NGC 6531.
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Messier 20 (M20), also known as the Trifid Nebula, is a famous star-forming region located in the constellation Sagittarius. The nebula’s designation in the New General Catalogue is NGC 6514. The name Trifid refers to its three-lobed appearance. Messier 20 consists of several different objects: an emission nebula, a reflection nebula, a dark nebula and an open star cluster.
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Messier 19 (M19) is a globular cluster located in the southern constellation Ophiuchus. The cluster has an apparent magnitude of 7.47 and lies at a distance of 28,700 light years, or 8,800 parsecs, from Earth. It has the designation NGC 6273 in the New General Catalogue.
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Messier 18 (M18) is a relatively dim open star cluster located in the constellation Sagittarius. The cluster lies at an approximate distance of 4,900 light years, or 1,500 parsecs, from Earth and has an apparent magnitude of 7.5. Its designation in the New General Catalogue is NGC 6613.
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Messier 17 (M17), also known as the Omega Nebula, is a famous star-forming nebula located in the southern constellation Sagittarius. The diffuse emission nebula lies near the constellation’s northern border with Scutum, at a distance of 5,000 to 6,000 light years from Earth. It has an apparent magnitude of 6.0.
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The Pillars of Creation are famous pillars of gas and dust found in one of the several star-forming regions of the Eagle Nebula, Messier 16. The region was named after a photograph taken by the Hubble Space Telescope on April 1, 1995.
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