[JoeProBono]

This image is a representation the constellation of Ursa Major The Big Dipper seen from the southern hemisphere in late winter just after sunset

[IndianChief]

I thought the second star in the Big Dipper is Mizar and fainter Alcor is the "double" star.

Does the double star have a double star?

[Fresh Wind]

Maybe Alcor will save us from global warming?

[Roscoe Karns]

[Lonesome in Massachussets]

I assume that both Alcor A and his companion would be single pixels if completely resolved, no? The apparent diameter of Alcor is due to diffraction (atmospheric and optical.)

[ReleaseTheHounds]

I think I’ve known about this twin star since my childhood (back when I could see it with the naked eye). It used to be a test of good eyesight. Maybe I’m wrong but I don’t think so.

[Little Pig]

So now we have a candidate system for Asimov’s “Nightfall”.

[SunkenCiv]

Cue the Tull! :')

Thanks Daffynition.

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