The stars of Berkeley 59 have recently left the gas envelopes that surround them. They are only a few million years old, so they are extremely young on the stellar scale. Young stars warm up the warm dust surrounding them, illuminating it. The Berkeley Cluster 59 is immersed in the NGC 7822nebula. In the interior of the nebula, a second generation of stars is already being formed, perhaps due to the warming and compression of gas by young stars.
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