MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Artwork of a Herbig-Haro object. The jets in this image are from a newly formed star between them, too small and faint to be seen. They are creating large bubbles in the surrounding gas and dust in the interstellar medium. The mechanism of jet formation is unclear, but may be due to gas being heated as it falls toward the new star, then being ejected at speed along the star's rotational axis.
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