Melotte 20, Alpha Persei Cluster, open cluster, Perseus constellation, naked eye visible, spectral class B, Mirfak, proper motion, 560 light years, 250mm lens, Giuseppe Donatiello

Melotte 20, Alpha Persei Cluster, open cluster, Perseus constellation, naked eye visible, spectral class B, Mirfak, proper motion, 560 light years, 250mm lens, Giuseppe Donatiello
Melotte 20, Alpha Persei Cluster, open cluster, Perseus constellation, naked eye visible, spectral class B, Mirfak, proper motion, 560 light years, 250mm lens, Giuseppe Donatiello
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