Astronomy Photos For Halloween 2019

Nothing spooky here, I’m afraid, just two young open star clusters. M39, the larger-looking (though not actually larger) triangular open cluster, lies a few degrees north and east of Deneb. It’s the elder cluster here at 300 million years old. The second cluster, Caldwell 16, lies in the constellation Lacerta, west of M39. It’s only 100 million years old, but there are indications that at least one of its stars has a planet orbiting it.

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