SCIENCE
Apurwa Amit | Oct 17, 2024, 03:50 PM IST
1.Open Clusters
Open clusters, which consist of a few dozen to several thousand stars, are formed from the same initial cloud of gas and dust. These clusters have a low density of stars, allowing individual stars to be seen with telescopes or even with the naked eye, giving them an "open" look. Most of these clusters can be found in the arms of spiral galaxies, and their stars are generally quite young. Unlike spherical clusters, open clusters have a more irregular shape and contain significant amounts of gas between the stars.
2.Globular Clusters
Globular clusters are significantly larger and denser than open clusters, comprising thousands to millions of stars that originated from a common nebula. In contrast to open clusters, the star density at the centers of globular clusters is so great that individual stars become difficult to distinguish, even with advanced telescopes. These clusters are typically found on the dusty peripheries of galaxies, and the stars within them are older compared to those in open clusters.
3.Embedded clusters
Embedded clusters are a precursor to open and globular clusters. As the youngest type of star cluster, they contain newly born and forming stars surrounded by cosmic gas and dust. As with open and globular clusters, all of the stars formed from the same initial nebula. Embedded clusters are likely the basic unit of star formation since a significant fraction of all stars form within them.
4.BSDL 2725
In a stunning image captured by the NASA Hubble Space Telescope, bright, blue-white stars from the open cluster BSDL 2757 stand out against the rusty-red hues of surrounding gas and dust clouds. This observation is part of a study examining how dust in the Large Magellanic Cloud blocks ultraviolet light across four distinct star-forming regions in this nearby irregular galaxy.
5.Pismis 24
The star cluster Pismis 24 lies within the much larger emission nebula called NGC 6357, located about 8,000 light-years from Earth. The cluster is seen here above a small portion of the nebula. The gas below the stars glows through ionization caused by intense ultraviolet radiation from the massive young stars within the cluster.
6.NGC 3603
Thousands of shimmering young stars are found within the massive nebula NGC 3603, which is recognized as one of the most substantial young star clusters in the Milky Way Galaxy. Located approximately 20,000 light-years away in the Carina spiral arm, NGC 3603 serves as a significant star-forming region. The image captures this young star cluster enveloped by an expansive area of dust and gas.
7.Westerlund 2
A cluster of young stars – about one to two million years old – located about 20,000 light years from Earth. Data in visible light from the Hubble Space Telescope (green and blue) reveal thick clouds where the stars are forming. High-energy radiation in the form of X-rays, however, can penetrate this cosmic haze, and are detected by Chandra (purple).
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