(stellar-sized black hole with quasar-like activity)
A microquasar is like a small quasar: a smaller black hole
(e.g., a stellar-mass black hole) accreting matter from a
companion star via an accretion disk with jets, all
analogous to those of a quasar, scaled down, but not necessarily
proportionally.
A number of microquasars are known, the first being SS 433,
an astronomical object whose existence was published in 1977,
and by 1980, there was speculation that it could include a black hole.