Jet from Young Star
Depicts: HH-1, HH-2
Copyright: J. Hester (Arizona State University), the WFPC 2 Investigation Definition Team, and NASA
This arrowhead structure is a classic bowshock pattern
produced when high-speed material encounters a slower-speed medium. Young stellar jets were discovered 20 years ago, in part due to visible-light observations of bright patches of nebulosity (called Herbig-Haro objects), which appear to be moving away from associated protostars.
Last Update: 1 September 2019