Blue stragglers (BSS) are main-sequence stars in open or globular clusters that are more luminous and bluer than stars at the main-sequence turn-off point for the cluster. Blue stragglers were first discovered by Allan Sandage in 1953 while performing photometry of the stars in the globular cluster M3. Standard theories of stellar evolution hold t...
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http://en.wikipedia.org/wiki/Blue_straggler
Blue stragglers photographed in the core of the globular cluster 47 Tucanae by the Hubble Space Telescope A hot, bright star in a globular cluster or, occasionally, an open cluster, that lies close to the cluster`s extrapolated main sequence but a few magnitudes above its turnoff point. Various...
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http://www.daviddarling.info/encyclopedia/B/blue_straggler.html
one of a small group of blue stars within a cluster that falls near the main sequence even though other stars of its color have evolved off the main sequence.
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https://www.infoplease.com/dictionary/blue-straggler
No exact match found.
