William Henry Smyth

m106,m106 galaxy,ngc 4258,spiral galaxy

Messier 106

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Messier 106 (M106) is a spiral galaxy located in the constellation Canes Venatici, the Hunting Dogs.

M106 lies at a distance of 23.7 million light years from Earth and has an apparent magnitude of 9.1. It has the designation NGC 4258 in the New General Catalogue.
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m103,open cluster m103,ngc 581

Messier 103

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Messier 103 (M103) is an open star cluster located in the northern constellation Cassiopeia.

The cluster lies at a distance of 10,000 light years from Earth and has an apparent magnitude of 7.4. Its designation in the New General Catalogue is NGC 581.
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m100,m100 galaxy,grand design spiral galaxy,ngc 4321

Messier 100

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Messier 100 (M100) is a grand design spiral galaxy located in the Virgo Cluster, in the constellation Coma Berenices. The galaxy lies at an approximate distance of 55 million light years from Earth and has an apparent magnitude of 10.1. Its designation in the New General Catalogue is NGC 4321.
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m98,ngc 4192,intermediate spiral galaxy

Messier 98

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Messier 98 (M98) is an intermediate spiral galaxy located in the Virgo Cluster, in the constellation Coma Berenices. The galaxy has an apparent magnitude of 11.0 and lies at an approximate distance of 44.4 million light years from Earth. Its designation in the New General Catalogue is NGC 4192.
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