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Súbor:Celestial fossils (potw2409a).jpg

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Popis
English: This densely populated group of stars is the globular cluster known as NGC 1841, which is found within the Large Magellanic Cloud (LMC), a satellite galaxy to the Milky Way galaxy that lies about 162 000 light-years away. Satellite galaxies are galaxies that are bound by gravity in orbits around a more massive host galaxy. We typically think of our galaxy’s nearest galactic companion as being the Andromeda Galaxy, but it would be more accurate to say that Andromeda is the nearest galaxy that is not in orbit around the Milky Way galaxy. In fact, our galaxy is orbited by tens of known satellite galaxies that are far closer than Andromeda, the largest and brightest of which is the LMC, which is easily visible to the naked eye from the southern hemisphere (although this is decreasingly the case thanks to light pollution). The LMC is home to many globular clusters. These celestial bodies fall somewhere between open clusters — which are much less dense and tightly bound — and small, compact galaxies. Increasingly sophisticated observations have revealed the stellar populations and other characteristics of globular clusters to be varied and complex, and it is not well understood how these tightly-packed clusters form. However, there are certain consistencies across all globular clusters: they are very stable and so are capable of lasting a long time, and can therefore be very old. This means that globular clusters often contain large numbers of very old stars, which make them something akin to celestial ‘fossils’. Just as fossils provide insight into the early development of life on Earth, globular clusters such as NGC 1841 can provide insights into very early star formation in galaxies.[Image Description: A cluster of stars. Most of the stars are very small and uniform in size, and they are notably bluish and cluster more densely together towards the centre of the image. Some appear larger in the foreground. The stars give way to a dark background at the corners.]
Dátum 26. februára 2024 (upload date)
Zdroj Celestial fossils
Autor ESA/Hubble & NASA, A. Sarajedini, F. Niederhofer
Ďalšie verzie

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This densely populated group of stars is the globular cluster known as NGC 1841, which is found within the Large Magellanic Cloud (LMC), a satellite galaxy to the Milky Way galaxy that lies about 162 000 light-years away.

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image/jpeg

3 046 obrazový prvok

šířka čeština

3 909 obrazový prvok

objem dat čeština

6 494 621 bajt

a7f6a28defaee708eb6a7e0634625ed949ebeb05

metoda určení čeština: SHA-1 čeština

26. február 2024

pHash checksum angličtina

10570c05lffz5fpfdv73q26q4b4xbtt940b5je85t8f17plmua

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Dátum/ČasNáhľadRozmeryPoužívateľKomentár
aktuálna09:01, 26. február 2024Náhľad verzie z 09:01, 26. február 20243 909 × 3 046 (6,19 MB)OptimusPrimeBot#Spacemedia - Upload of https://cdn.esahubble.org/archives/images/large/potw2409a.jpg via Commons:Spacemedia

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