This image from the Very Large Telescope (VLT) at Paranal Observatory in northern Chile shows the globular cluster Messier 54. This cluster looks very similar to many others, but it has a secret. Messier 54 doesn't belong to the Milky Way, but actually is part of a small satellite galaxy, the Sagittarius Dwarf Galaxy. This unusual parentage has allowed astronomers to use the VLT to test whether unexpectedly low levels of the element lithium in stars are also found in stars outside the Milky Way.
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TOP22315128
Source:
達志影像
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RM
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須由TPG 完整授權
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sagittariusdwarfgalaxym54messier54globularclusterparanalobservatoryvltverylargetelescopespacedustspacegascosmosuniversedeepskydeepspaceheavenlybodycelestialobjectcelestialbodyastronomicalobjectastronomicalastronomysciencespaceexplorationspacenebulaenebularadiationstellarwindstarformationformingstarstargalaxiesgalaxy
5454astronomicalastronomicalastronomybodybodycelestialcelestialclustercosmosdeepdeepdustdwarfexplorationformationforminggalaxiesgalaxygalaxygasglobularheavenlylargemmessiernebulanebulaeobjectobjectobservatoryparanalradiationsagittariusscienceskyspacespacespacespacespacestarstarstarstellartelescopeuniverseveryvltwind
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