Herbig-Haro 211 (HH 211), un chorro bipolar que fluye por el espacio interestelar a velocidades supersónicas, ha sido observado con excelente detalle por el telescopio espacial James Webb de la NASA. Es uno de los chorros protoestelares más jóvenes y cercanos, a unos 1.000 años-luz de la Tierra, en la constelación de Perseo. Cuando vientos estelares o chorros de gas emitidos por estrellas jóvenes chocan con el gas y el polvo vecinos a gran velocidad, crean objetos Herbig-Haro (HH).
- Paper:
www.nature.com/articles/s41586-023-06551-1 
- HH 211: Telescopio Webb (página oficial): webbtelescope.org/contents/news-releases/2023/news-2023-141
- HH 211: Space.com: www.space.com/supersonic-jets-young-star-space-james-webb-space-telesc
- HH 111: www.meneame.net/m/astronomia/hubble-captura-estrella-dispara-potente-c , en.wikipedia.org/wiki/HH_111
- HH 24: www.meneame.net/m/astronomia/herbig-haro-24-eng , en.wikipedia.org/wiki/HH_24-26
- HH 666: Telescopio Hubble ("666" siempre es un buen criterio
- 3 Wikis: en.wikipedia.org/wiki/Herbig–Haro_object , en.wikipedia.org/wiki/Astrophysical_jet , en.wikipedia.org/wiki/Star_formation
- 1 Wikimedia: galería de imágenes de Objetos Herbig–Haro: commons.wikimedia.org/wiki/Category:Herbig–Haro_objects
- James Webb: "NASA's Webb Snaps Supersonic Outflow of Young Star": webbtelescope.org/contents/news-releases/2023/news-2023-141
- Space.com: "Stunning James Webb Space Telescope image shows young star blasting supersonic jets": www.space.com/supersonic-jets-young-star-space-james-webb-space-telesc
Quizá "supersónico" tenga un significado partícular en astronomía, pero ni idea. Si alguien puede ilustrarnos, gracias por adelantado.
Para que me entendáis, la tierra esta dentro de la "atmósfera" del sol, la heliosfera, y el movimiento del plasma crea "ondas de sonido"
No puedo explicar mucho mas por que esto lo estudie hace unos cuantos años es bastante complicado y ahora mismo no me acuerdo de mucho mas
- earthsky.org/space/supersonic-stars-reveal-milky-ways-heart/
---> "And what is that speed? One of the researchers, Idan Ginsburg of Harvard, said in an email to EarthSky:
Let me explain what supersonic means in this context. The galactic center is more dense and also much hotter than most of the ‘space’ in the Milky Way. This raises the speed of sound. So although on Earth the speed of sound is about 340 m/s at sea level, at the galactic center it is much larger. There, the speed of sound is in fact a few hundred kilometers per second. It’s roughly larger by a factor of 1,000!
So, when we’re talking about supersonic stars in the galactic center, we’re talking about stars that are moving thousands of kilometers per second. This is equivalent to millions of miles per hour."
- en.wikipedia.org/wiki/Interstellar_medium#Structures
--> "Astronomers describe the ISM as turbulent, meaning that the gas has quasi-random motions coherent over a large range of spatial scales. Unlike normal turbulence, in which the fluid motions are highly subsonic, the bulk motions of the ISM are usually larger than the sound speed. Supersonic collisions between gas clouds cause shock waves which compress and heat the gas, increasing the sounds speed so that the flow is locally subsonic; thus supersonic turbulence has been described as 'a box of shocklets', and is inevitably associated with complex density and temperature structure. In the ISM this is further complicated by the magnetic field, which provides wave modes such as Alfvén waves which are often faster than pure sound waves: if turbulent speeds are supersonic but below the Alfvén wave speed, the behaviour is more like subsonic turbulence. "