NGC 7538 is an emission nebula that lies not far from the Bubble Nebula in Cassiopeia, about 9,100 light years away. It has an apparent size of about 8′ x 7′ (the full moon is about 30′ across). NGC ...

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NGC 2266 is also catalogued as Melotte 50. It is an open cluster located in Gemini and lying about 10,603 light years from Earth. It is estimated to be a little more than 81 million years old, similar ...

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