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William Henry Smyth

m18,ngc 6613,open cluster

Messier 18

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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,omega nebula,m17,m17 nebula

Messier 17: Omega Nebula

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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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m14,globular cluster,ngc 6402

Messier 14

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Messier 14 (M14) is a globular cluster located in the southern constellation Ophiuchus. The cluster lies at a distance of 30,300 light years from Earth and has an apparent magnitude of 7.6. It has the designation NGC 6402 in the New General Catalogue.
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Hercules Globular Cluster,M13 cluster,mM13,great hercules cluster

Messier 13: Hercules Globular Cluster

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Messier 13 (M13), also known as the Great Globular Cluster in Hercules, is a globular cluster located in Hercules constellation. It is one of the brightest and best known globular clusters in the northern sky. The cluster has an apparent magnitude of 5.8 and lies at a distance of 22,200 light years, or 6,800 parsecs, from Earth. Its designation in the New General Catalogue is NGC 6205.
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