Soubor:A Swarm of Ancient Stars - GPN-2000-000930.jpg

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Fotografie + English: This stellar swarm is M80 (NGC 6093), one of the densest of the 147 known globular star clusters in the Milky Way galaxy. Located about 28,000 light-years from Earth, M80 contains hundreds of thousands of stars, all held together by their mutual gravitational attraction. Globular clusters are particularly useful for studying stellar evolution, since all of the stars in the cluster have the same age (about 12 billion years), but cover a range of stellar masses. Every star visible in this image is either more highly evolved than, or in a few rare cases more massive than, our own Sun. Especially obvious are the bright red giants, which are stars similar to the Sun in mass that are nearing the ends of their lives.

• Date: 1 July 1999
• Source: Great Images in NASA
• Author: NASA, The Hubble Heritage Team, STScI, AURA

+ pochází z Wikimedia Commons, kde má status – This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.

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	Datum a čas	Náhled	Rozměry	Uživatel	Komentář
současná	11. 12. 2016, 11:33		1 777×1 864 (4,03 MB)	Student85 (diskuse | příspěvky)	(Fotografie + + pochází z Wikimedia Commons, kde má status – Kategorie:CC fotografie)

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