Harlow Shapley

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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andromeda galaxy,ngc 224

Messier 31: Andromeda Galaxy

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Messier 31 (M31), better known as the Andromeda Galaxy, is a large spiral galaxy located in the constellation Andromeda. Lying at a distance of 2.54 million light years from Earth, the Andromeda Galaxy is the nearest major galaxy to our own. It is on a collision course with our home galaxy, the Milky Way. Messier 31 has an apparent magnitude of 3.44. Its designation in the New General Catalogue is NGC 224.
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ngc 6254,m10,globular cluster

Messier 10

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Messier 10 (M10) is a rich, bright globular cluster located in the constellation Ophiuchus. It lies at a distance of 14,300 light years from Earth and has an apparent magnitude of 6.4. Its designation in the New General Catalogue is NGC 6254.
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