One of these objects is Messier 55, a globular star cluster located in the Sagittarius Constellation. Also known as the “Summer Rose Star”, this cluster is located 17,600 light-years from Earth and spans about 100 light-years in diameter.What is the Messier 56 cluster?
Messier 56. Messier 56 (also known as M56 or NGC 6779) is a globular cluster in the constellation Lyra.How many blue straggler stars are in Messier 55?
The colour-magnitude diagram of M55 shows the presence of a population of 56 blue-straggler stars that are more centrally concentrated than the red giant-branch stars.” And viewing globular clusters like Messier 55 in a different wavelength of light other than optical reveals even more stunning details – like the vision of the XMM-Newton.What are the characteristics of the star cluster M55?
The stars in the cluster are mostly old and red, but M55 also contains an unusually high number of blue stragglers, old stars that appear younger, bluer and more luminous than similar stars their age as a result of interactions and mergers with neighbouring stars in the cluster. Messier 55 is one of the most metal-poor globular clusters known.