Figure 18-14: R I V U X G
Bipolar Outflow and Herbig-Haro Objects The two bright knots of glowing, ionized gas called HH 1 and HH 2 are Herbig-Haro objects. They are created when fast-moving gas ejected from a protostar slams into the surrounding interstellar medium, heating the gas to high temperature. HH 1 and HH 2 are 0.34 pc (1.1 ly) apart and lie 470 pc (1500 ly) from Earth in the constellation Orion.
Bipolar Outflow and Herbig-Haro Objects The two bright knots of glowing, ionized gas called HH 1 and HH 2 are Herbig-Haro objects. They are created when fast-moving gas ejected from a protostar slams into the surrounding interstellar medium, heating the gas to high temperature. HH 1 and HH 2 are 0.34 pc (1.1 ly) apart and lie 470 pc (1500 ly) from Earth in the constellation Orion.
(J. Hester [Arizona State University], the WFPC-2 Investigation Team, and NASA)