Grabbed the National Geographic magazine Special Edition Atlas of the Night Sky.
5:45 AM. Skimmed what I had read so far. Including the chapter Our Sun and Other Stars.
Page 10.
Noted, in my morning haze, the infographics in the small table entitled "Multiple Star Systems." A simple binary with equal stars to a double-double, two pairs orbiting each other.
Oh. Oh ho!
They were talking about hierarchy structures! Yes, double star types, binary systems and their masses. Very cool. I was very pleased to see this here. On many levels.
Common question raised at star parties: are these stars related?
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