New image of Hubble puzzled scientists

In a new image taken by the NASA/European Space Agency Hubble Space Telescope,

the globular star cluster (GC) NGC is shown2419. Such objects are both beautiful and attractive from a scientific point of view. These are spherical groups of stars that orbit around the center of the galaxy. In the case of NGC 2419, this galaxy is the Milky Way. NGC 2419 is located approximately 300,000 light years from the Solar System, in the constellation Lynx.

The stars that inhabit globular clusters are veryare similar because they were formed at approximately the same time. Astronomers can determine their relative age by their chemical composition. Because all the stars in a globular cluster formed around the same time, they tend to have similar properties. Astronomers believed that this was due to the helium content in them. Therefore, scientists believed that all GC objects contained the same amount of gas. However, Hubble's observations of NGC 2419 have puzzled scientists; According to the telescope, this is not always the case.

Photo: ESA/Hubble & NASA, S. Larsen et al.

According to the Space Flight CenterGoddard NASA, GC consists of two separate populations of red giants, one of which is unusually rich in helium. The stars of NGC 2419 contain other elements that also vary. In particular, their nitrogen content varies. In addition, helium-rich stars are found predominantly in the center of a globular cluster. Hubble's observations raised questions about the formation of globular clusters. For example, did these two completely different groups of stars form together or did this GC appear somehow differently.

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