Bright nebular patches formed when jets of gas from young stars collide with surrounding interstellar material at high speeds. These objects appear as small, colorful nebulae that change shape over years or decades.
Named after astronomers George Herbig and Guillermo Haro who independently studied these objects in the 1940s and 1950s. They recognized these nebulae as a distinct class of astronomical objects associated with star formation.
Herbig-Haro objects are like cosmic geysers - they're the spectacular light shows created when baby stars shoot jets of material into space at hundreds of kilometers per second! These objects actually move and change shape over human timescales, making them some of the most dynamic phenomena visible in telescopes.
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