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The Jewel Box (also known as NGC 4755 or Kappa Crucis Cluster) is an open cluster in the constellation of Crux. This cluster is one of the youngest known, with an estimated age of only 7.1 million years. It has an apparent magnitude of 4.2, and is located 6,440 light years from Earth and contains around 100 stars.
This is a very deep and real image, so the "noise" in background is no noise, these are very very dim stars again.The image is not overprocessed and sharp.The image procsseing is made according to scientific rules for long exposed astronomical pictures.