![]() Zamani (ESA/Webb), and the PDRs4All ERS Team The energy of the stellar radiation is slowly eroding the Orion Bar, and this has a profound effect on the molecules and chemistry in the protoplanetary disks that have formed around newborn stars here. It is a region where energetic ultraviolet light from the Trapezium Cluster-located off the upper-left corner-interacts with dense molecular clouds. This image taken by Webb's NIRCam (Near-Infrared Camera) shows a part of the Orion Nebula known as the Orion Bar. Scientists believe that most planet-forming disks go through a period of such intense UV radiation, since stars tend to form in groups that often include massive, UV-producing stars. While the star in d203-506 is a small red dwarf, the system is bombarded by strong ultraviolet (UV) light from nearby hot, young, massive stars. "This detection not only validates the incredible sensitivity of Webb but also confirms the postulated central importance of CH 3 + in interstellar chemistry," said Marie-Aline Martin-Drumel of the University of Paris-Saclay in France, a member of the science team. Berné and the PDRs4All ERS Team, Music: Stellardrone – Twilight ![]() ![]() Its great brightness - it is visible with the naked eye - is due to the fact that θ² Orionis A is itself a ternary system made of three closely bound bright stars. The brightest star here, θ² Orionis A, is surrounded by particularly bright and red puffs of dust, which are reflecting the star’s light towards Earth. The two very large, bright stars are two of the three stars in the θ² Orionis system - the Trapezium Cluster is also known as θ¹ Orionis. ![]() The radiation also ionises the molecules, causing them to emit light - not only does this create a beautiful vista, it also allows astronomers to study the molecules using the spectrum of their emitted light obtained with Webb’s MIRI and NIRSpec instruments. The radiation erodes the nebula’s gas and dust in a process known as photoevaporation this creates the rich tapestry of cavities and filaments that fill the view. This made it a perfect place to study the exact impact that ultraviolet radiation has on the molecular makeup of the discs of gas and dust that surround new stars. Bathed in harsh ultraviolet light from the stars of the Trapezium Cluster, it is an area of intense activity, with star formation and active astrochemistry. This video features NIRCam’s view of the Orion Bar region studied by the team of astronomers. ![]()
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