Herbig–Haro object
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 Herbig–Haro object HH47, imaged by the Hubble Space Telescope. The scale bar represents 1000 Astronomical Units (1000 times the distance from the Earth to the Sun), about 20 times the size of our solar system. |
Herbig–Haro objects (HH) are small patches of nebulosity associated with newly born stars, and are formed when narrow jets of gas ejected by young stars collide with clouds of gas and dust nearby at speeds of several hundred kilometres per second. Herbig–Haro objects are ubiquitous in star-forming regions, and several are often seen around a single star, aligned along its rotational axis.
- Related: Protoplanetary disk, HH 34
| Comprehensive catalogue of HH objects at the Unive... Comprehensive catalogue of HH objects at the University of Colorado casa.colorado.edu/hhcat/ - Web |
| HH objects in the Encyclopedia of Astrobiology, As... HH objects in the Encyclopedia of Astrobiology, Astronomy, and Spaceflight www.daviddarling.info/encyclopedia/H/Herbig-Haro_object.html - Web |
| Animations of HH object jets from HST observations Animations of HH object jets from HST observations sparky.rice.edu/~hartigan/movies.html - Web |
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| A Catalogue of Molecular Hydrogen Emission-Line Ob... A Catalogue of Molecular Hydrogen Emission-Line Objects in Outflows from Young Stars: MHO Catalogue www.jach.hawaii.edu/UKIRT/MHCat/ - Web |
