Astronomy4all
Mizar A by Digital Drew Space Art on Flickr.Via Flickr:
Mizar A, which is part of the quadruple Mizar system, is itself a binary star system consisting of two bluish-white main sequence stars over twice the mass of our own sun.  They are a close pair, taking 20.5 days to revolve about their common center of gravity.  Here the pair can be seen from a close hypothetical planet in orbit around the binary.  The planet is still very geologically active due to tidal forces as well as the relatively young age of the star system.  (The Mizar system is estimated to be 500 million years old.)
This is an updated version of my original Mizar A image.

Mizar A by Digital Drew Space Art on Flickr.

Via Flickr:
Mizar A, which is part of the quadruple Mizar system, is itself a binary star system consisting of two bluish-white main sequence stars over twice the mass of our own sun. They are a close pair, taking 20.5 days to revolve about their common center of gravity. Here the pair can be seen from a close hypothetical planet in orbit around the binary. The planet is still very geologically active due to tidal forces as well as the relatively young age of the star system. (The Mizar system is estimated to be 500 million years old.)

This is an updated version of my original Mizar A image.

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