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Enter the Astronomy Photographer of the Year competition
Astronomy Photographer of the Year competition
Celestial Impasto: Sh2 - 239 by Adam Block (USA): Structures like this often seem unchanging and timeless on the scale of a human lifetime. However, they are fleeting and transient on astronomical timescales. Over just a few thousand years the fierce radiation from the stars in this nebula will erode the surrounding clouds of dust and gas, radically altering its appearance.