NASA has unveiled a new image of the Hubble Space Telescope.A ball
A globular cluster is a collection of starsbound by gravity. Such objects can contain from several tens to millions of objects. As a rule, the concentration of stars is higher in the center of the cluster, and lower at the edges. The NGC 6558 cluster was one of the very first to be discovered. It was discovered by British astronomer William Herschel in 1748.
Cluster NGC 6558. Image: ESA/Hubble & NASA, R. Cohen
This cluster is located at a distance of 23 thousand km.light years from Earth. Hubble's advanced camera reveals many stars of different hues. Some of the brightest have noticeable diffraction bursts. These image artifacts are the result of starlight interacting with the telescope's secondary mirror support system, the scientists explain.
Globular clusters are made up of starsformed at about the same time and from the same environment. Therefore, as a rule, most of them have a close or similar composition. They are natural laboratories where scientists can observe how different stars develop under similar conditions.
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