The Extraordinary Spiral in LL Pegasi (top left). No one knows exactly what it is but it is likely to be a star in a binary star system entering the planetary nebula phase. It is about 1/3 of a light year across. (Check NASA's Astronomy picture of the day).

https://bit.ly/3xzBvir via /r/spaceporn https://bit.ly/31b2WD4