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Anne’s Image of the Day: Herbig–Haro objects HH1 and HH2

29 Mar 2014, 15:01 UTC
Anne’s Image of the Day: Herbig–Haro objects HH1 and HH2
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March 29, 2014 HH1 and HH2, gas jets from a proto-star in Orion Image Credit: J. Hester (Arizona State University), the WFPC 2 Team and NASA/ESA Herbig–Haro objects HH1 (left) and HH2 (right) are gas jets from a proto-star, located about 1,500 light-years away from Earth in the equatorial constellation of Orion (the Hunter), [continue reading]

March 29, 2014
HH1 and HH2, gas jets from a proto-star in Orion

Image Credit: J. Hester (Arizona State University), the WFPC 2 Team and NASA/ESA
Herbig–Haro objects HH1 (left) and HH2 (right) are gas jets from a proto-star, located about 1,500 light-years away from Earth in the equatorial constellation of Orion (the Hunter), near the Orion Nebula. The jets have a speed of more than 700,000 kilometers per hour.
A star forms from a collapsing cloud of cold hydrogen gas. As the star grows, it gravitationally attracts more matter, creating a large spinning disk of gas and dust around it. The disk material gradually spirals onto the star and escapes as high velocity jets along the star’s axis of spin. The high-speed jets may initially be confined to narrow beams by the star’s powerful magnetic field. The jet phase stops when the disk ...

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