NGC 6642 is a
globular cluster located 26,700 light-years from Earth,
[ in the constellation Sagittarius. Many "]blue stragglers
A blue straggler is a main-sequence star in an open or globular cluster that is more luminous and bluer than stars at the main sequence turnoff point for the cluster. Blue stragglers were first discovered by Allan Sandage in 1953 while performin ...
" (stars which seemingly lag behind in their rate of aging) have been spotted in this globular, and it is known to be lacking in low-mass stars.[
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References
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Globular clusters
6642
Sagittarius (constellation)
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