NGC 1805, NASA, National Aeronautics and Space Administration is always at work delivering us beautiful artifacts of the universe. The scientists are always figuring out the mysteries that various giants like Stephen Hawking gave us a little inkling of. On September 12, 2020, NASA shared a beautiful picture of colorful stars packed together. In scientific terms, it showed the picture of a globular cluster. It is a spherical collection of stars that orbits a galactic core. The gravitational pull between them make them very tightly placed, hence, forming the cluster. Globular clusters usually contain stars born at the same time.
About NGC 1805 picture shared by NASA
NASA/ ESA Hubble space telescope captured many colorful stars paced together. The image is named NGC 1805. The group of stars locates very close to each other near the edge of the Large Magellanic Cloud. It is a satellite galaxy in our Milky Way galaxy. If you don’t know what is a satellite galaxy, it is simply a small galaxy that travels on bound/fixed orbits within the gravitational allowance of a luminous host galaxy.
Hence, the Large Magellanic Cloud is a satellite galaxy orbiting in fixed rounds in the primary galaxy, which is, the Milky Way. A feature of the NGC 1805 stars is that they orbit like bees swarming in a hive. Hence, they are pretty close and their sounds are majestic. In the dense center of this globular cluster, stars are bound 100 to 1,000 times closer than the nearest stars to the Sun. This is why there cannot be any planetary systems around them.
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A pocketful of stars ✨ This image from our @NASAHubble Space Telescope shows globular cluster NGC 1805, located near the edge of the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. In its center, thousands of stars are packed 100 to 1,000 times closer to one another than the nearest stars are to our Sun. The striking difference in star colors is illustrated in the image, which combines different types of light: blue stars, shining brightest in near-ultraviolet light, and red stars, illuminated in red and near-infrared. Caption: @EuropeanSpaceAgency Credit: ESA/Hubble & NASA, J. Kalirai #NASA #Hubble #Stars #Sparkles #Universe
NASA also described how they look and what is the reason behind their different colors. You can clearly see the striking differences in the colors in the given picture. They include blue stars, which shine the brightest in the center, and the red stars, which locate near-infrared. NASA wrote, “Space telescopes like Hubble can observe in the ultraviolet because they are positioned above Earth’s atmosphere.”
Hence, these stars absorb the most UV rays which make them inaccessible to ground-based facilities. NGC 1805, like other globular clusters, does not have a single population but hosts two different populations of stars. A subsequent feature is their ages are millions of years apart.
How can you see this majestic NGC 1805 cluster?
You can view the young globular cluster from the Southern Hemisphere, in the Dorado constellation, which translates to dolphinfish in the Portuguese language. These clusters can help astronomers understand the evolution of stars and a better understanding of the explosion of white dwarfs as supernovae.