Milisavljevic leads a team of some 50 international scientists awarded approximately 45 hours of Webb Telescope time. It’s thought that such mass loss data likely holds key information about the supernova’s progenitor star or stars. It's detailing mass loss from the star prior to its explosion, he notes. I'm also taken aback by the red/orange glow the surrounds the bright ring of stellar debris, he says. These formations were completely unexpected, and we have a "Dream Team" of experts coming up with theories to explain their origin, says Milisavljevic. * Such remnants are thought to be crucial in seeding new generations of stars and planets with biologically important elements like calcium and iron. MilisavljevicĮxquisite new mid-infrared Webb Space Telescope images of Cassiopeia A (Cas A) - our Milky Way Galaxy’s youngest known core collapse supernova remnant - may finally enable astronomers to understand this colorful agglomeration of dust and debris. The data comes from the general observer program 1947. This image combines various filters with the colour red assigned to 25.5 microns (F2550W), orange-red to 21 microns (F2100W), orange to 18 microns (F1800W), yellow to 12.8 microns (F1280W), green to 11.3 microns (F1130W), cyan to 10 microns (F1000W), light blue to 7.7 microns (F770W), and blue to 5.6 microns (F560W). Its shape and complexity are unexpected and challenging for scientists to understand. A loop represented in green extends across the right side of the central cavity. The stellar material can also be seen as fainter wisps near the cavity’s interior. This represents material from the star itself, and likely shines due to a mix of various heavy elements and dust emission. Interior to this outer shell lie mottled filaments of bright pink studded with clumps and knots. This marks where ejected material from the exploded star is ramming into surrounding circumstellar material. On the remnant’s exterior, particularly at the top and left, lie curtains of material appearing orange and red due to emission from warm dust. This new image uses data from Webb’s Mid-Infrared Instrument (MIRI) to reveal Cas A in a new light. Cassiopeia A (Cas A) is a supernova remnant located about 11,000 light-years from Earth in the.
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