common shell

This image from the ALMA telescope shows the star system HD101584 and the complex gas clouds surrounding the binary pair. The clouds are the result of two stars that shared a common outer layer in the last moments of their lives. Credit: ALMA (ESO/NAOJ/NRAO), Olofsson et al., : Robert Cumming.

Dead and Alive: Astronomers Reveal Star Pairs That Are Changing Our Universe

Astronomers have discovered for the first time pairs of binary star systems, consisting of the remnant of a dead star (a white dwarf) and a living star (a main sequence star), within young clusters