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.

<<  Sentyabr'  >> Pn Vt Sr Cht Pt Sb Vs         1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30   1995   1996   1997 1998   1999   2000 2001   2002   2003 2004   2005   2006 2007   2008   2009 2010   2011   2012 2013   2014   2015 2016   2017   2018 2019   2020   2021 2022   2023   2024

Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr'

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: 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 HD 163296: dzhet ot formiruyusheisya zvezdy Vse publikacii na tu zhe temu >>