Astrophysics (Index)About

Herbig-Haro object

(illuminated nebula from colliding jets)

A Herbig-Haro object (HH or HHO) is a small, glowing nebula resulting from the collision of the plasma of a jet from a protostar with the surrounding ISM. They are found on the order of a parsec from the protostar. Sometimes the a single such star has two HHs, star, i.e., from its opposing jets. They are found in star-forming regions, often near Bok globules.

(protostars,jets,star formation,nebulae,object type)
Further reading:
HHHH 36generic designator