Explanation: Do stars always create jets as they form? No one is sure. As a gas cloud gravitationally contracts, it forms a disk that can spin too fast to continue contracting into a protostar. Theorists hypothesize that this spin can be reduced by expelling jets. This speculation coincides with known Herbig-Haro (HH) objects, young stellar objects seen to emit jets -- sometimes in spectacular fashion. Pictured is Herbig-Haro 211, a young star in formation recently imaged by the Webb Space Telescope (JWST) in infrared light and in great detail. Along with the two narrow beams of particles, red shock waves can be seen as the outflows impact existing interstellar gas. The jets of HH 221 will likely change shape as they brighten and fade over the next 100,000 years, as research into the details of star formation continues.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: Herbig-Haro object - jet - Ob'ekt Herbiga-Aro - dzhet Publikacii so slovami: Herbig-Haro object - jet - Ob'ekt Herbiga-Aro - dzhet
Sm. takzhe: Porfirion: samyi dlinnyi dzhet ot chernoi dyry Galaktika, dzhet i znamenitaya chernaya dyra Akkreciruyushaya chernaya dyra s dzhetom Molodye zvezdy i dzhety Zvezdy, pyl', stolby i strui v tumannosti Pelikan Dzhet ot molodoi zvezdy MHO 2147 HH 666: pylevoi stolb s dzhetom v Kile Vse publikacii na tu zhe temu >>