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Publications of the Astronomical Society of Australia, 1967
The globular clusters 47 Tuc (NGC 104) and NGC 6723 both belong to the group of clusters which have late-type integrated spectra and which appear to be only slightly metal deficient with respect to the stars in the Hyades.
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The globular clusters 47 Tuc (NGC 104) and NGC 6723 both belong to the group of clusters which have late-type integrated spectra and which appear to be only slightly metal deficient with respect to the stars in the Hyades.
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1998
Globular clusters are roughly spherical, densely packed groups of stars found around galaxies. Most globular clusters probably formed at the same time as their host galaxies. They therefore provide a unique fossil record of the conditions during the formation and early evolution of galaxies.
Keith M. Ashman, Stephen E. Zepf
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Globular clusters are roughly spherical, densely packed groups of stars found around galaxies. Most globular clusters probably formed at the same time as their host galaxies. They therefore provide a unique fossil record of the conditions during the formation and early evolution of galaxies.
Keith M. Ashman, Stephen E. Zepf
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Science, 2002
Globular clusters--compact assemblies of stars that typically contain ~100,000 to ~1,000,000 stars--are relics from the time when galaxies first formed. In her Perspective, [Johnson][1] reviews recent observations of very young clusters in starburst galaxies. The results suggest that we may be observing the birth of globular clusters for the first time.
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Globular clusters--compact assemblies of stars that typically contain ~100,000 to ~1,000,000 stars--are relics from the time when galaxies first formed. In her Perspective, [Johnson][1] reviews recent observations of very young clusters in starburst galaxies. The results suggest that we may be observing the birth of globular clusters for the first time.
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2015
Globular clusters are a unique system of stars in the universe. With the exception of the Ultra Compact Dwarfs (Chap. 1), no other stellar grouping contains so many stars compacted into such a small volume. A typical cluster will contain over 100,000 stars in a volume of 1,000,000 cubic light years. However, this is slightly misleading.
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Globular clusters are a unique system of stars in the universe. With the exception of the Ultra Compact Dwarfs (Chap. 1), no other stellar grouping contains so many stars compacted into such a small volume. A typical cluster will contain over 100,000 stars in a volume of 1,000,000 cubic light years. However, this is slightly misleading.
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