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How big is the NGC 2516 cluster
Scientists at Princeton University decided to observe the star cluster, directed their telescopes in the direction of the constellation Keel and now they are studying with great success a cloud of stars with a size of 33 light-years, this star cluster is also called the scattered star cluster NGC 2516. This star cluster has a radius of 33 light-years, this cluster glows as an object with a size of 1600 light-years. This unique natural zoo of different types of stars is located at a distance of 1217 light-years from us. If you decide to fly there in a dream and see everything as if in place, then you need to move in the direction of the constellation Kiel right now.
This constellation is referred to in some catalogs as the object Caldwell 96, Southern Hive and Sprinter. An astronomer from France found these stars for the first time, he was lucky to do it exactly when it is not known, but if approximately, it was somewhere in the 1750s.
The Gaia mission has already accumulated a decent amount of data on this star cluster and at this stage scientists are trying to find out the age of all regions of the constellation. TESS (NASA) data is used for this, at the initial stage, astronomers are trying to find out more precisely the rotation speeds of the brightest stars in all areas of the cluster.
First, the Gaia mission counted the brightest stars, and now the TESS telescope (NASA) analyzes each star separately, the first analysis showed that most of the stars of the same age and mass rotate at approximately the same speed, which clearly indicates that all these stars come from the same stellar nursery.
Thanks to the Gaia mission, the stars defined in the constellation have accurate coordinates and they can be easily detected if necessary. The Gaia system itself may well find stars in the constellation that are moving in the same direction and at the same speed. The algorithm worked perfectly, checking the stars taken separately from the sample showed that everything worked as expected and there is almost no unnecessary noise in the data.
There is an assumption that this cluster originated from a certain dense gas-dust cloud of relatively small size. A lot of time has passed since then and the cloud has now largely expanded.
This topic may be interesting, since it was decided to discuss it directly at the 238th meeting of the American Astronomical Society (AAS).
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