What is a Herbig-Haro (HH) Object?

Pelican Nebula with Herbig-Haro object region highlighted

Herbig-Haro (HH) objects are small-scale shock regions intimately associated with star forming regions. They have characteristic spectra which set them apart from photo-ionized regions. The best way to unequivocally identify a nebulous object in a star forming region as an HH object is to take a spectrum.

In the image above, the highlighted area contians several of these objects. Click inside the highlighted area to magnify that area.

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Herbig-Haro region