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How massive are globular clusters’ stars? They’re old, so they can't be too big, right?

David Oertel, Bangor, Maine
RELATED TOPICS: STARS
NGC-0104--Thomas-V-Davis
Astronomers measure stellar masses in terms of the Sun’s mass (just shy of 4.4 quadrillion quadrillion pounds [2.0 quadrillion quadrillion kilograms]). Most stars in globular clusters today are less massive than the Sun, but some exceptions exist. Thus, the answer to your question comes in three parts — normal stars, “blue stragglers,” and stellar remnants.

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