Symbiotic R Aquarii : A long recognized naked-eye variable star,…

Symbiotic R Aquarii : A long recognized naked-eye variable star, R Aquarii is actually an interacting binary star system, two stars that seem to have a close, symbiotic relationship. About 710 light years away, it consists of a cool red giant star and hot, dense white dwarf star in mutual orbit around their common center of mass. The binary systems visible light is dominated by the red giant, itself a Mira-type long period variable star. But material in cool giant stars extended envelope is pulled by gravity onto the surface of the smaller, denser white dwarf, eventually triggering a thermonuclear explosion and blasting material into space. Optical image data . The composite field of view is less that a light-year across at the estimated distance of R Aquarii. via NASA

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