21 'one-in-a-million' extreme dead stars found hiding around sun-like stars

An orange orb next to a bright light blue object against a dark brown background.

Astronomers have discovered 21 "one in a million" binary systems in which sun-like stars orbit a hidden "dead star," an extreme dense and compact object called a neutron star. 

One of the neutron stars discovered in this clutch of binaries is one of the most massive dead stars of this type ever seen.