NASA’s James Webb Space Telescope has captured the rare phase of a star nearing death.
An image of the super bright, massive Wolf-Rayet star, known as WR 124, was captured in June of last year – one of the first observations made by the $10 billion-dollar observatory using its infrared instruments.
The Wolf-Rayet phase is a fleeting stage that only some stars go through, soon before they explode. The stars in that phase are in the process of casting off their outer later, resulting in halos of gas and dust.
The star is located 15,000 light-years away in the constellation Sagittarius.
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It is 30 times the mass of the sun and has shed 10 suns’ worth of material thus far.
Dust is particularly interesting to astronomers because it shelters forming stars, forms planets and serves as a platform for molecules to form and clump together. Notably, the universe is operating with a dust budget surplus.
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Cosmic dust is best observed in infrared wavelengths of light and Webb’s Near-Infrared Camera, or NIRCam, balances the brightness of WR 124’s stellar core and the knotty details in the fainter surrounding gas. The telescope’s Mid-Infrared Instrument (MIRI) reveals the structure of the gas and dust nebula of the ejected material now surrounding the star.
Furthermore, stars like WR 124 help scientists understand a crucial period in the early history of the universe when similarly dying stars first seeded the young universe with heavy elements forged in their cores.
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