Weekend Astronomy Pic

Shell of a supernova:


"A new star, likely the brightest supernova in recorded human history, lit up planet Earth's sky in the year 1006 AD.
Now known as the SN 1006 supernova remnant, the debris cloud appears to be about 60 light-years across and is understood to represent the remains of a white dwarf star. Part of a binary star system, the compact white dwarf gradually captured material from its companion star. The buildup in mass finally triggered a thermonuclear explosion that destroyed the dwarf star.."

Link.

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