Webb captures a stunning view of a famous supernova remnant


One of the satellite galaxies of the Milky Way, the Large Magellanic Cloud, is famous as the host of the nearest supernova to Earth in recent history. Supernova SN 1987A occurred when a massive star ran out of fuel and collapsed at the end of its life, setting off an enormous explosion that threw out a shock wave so powerful it reshaped the dust and gas around it for millions of miles in every direction.

That supernova left behind a remnant, a ring-shaped structure created as the shock wave traveled outward over time. This glowing ring has been frequently observed since the supernova was first seen in 1987. Now, the James Webb Space Telescope has provided one of the most detailed views yet of this stunning structure that was created from a destructive explosion.

Webb’s NIRCam (Near-Infrared Camera) captured this detailed image of SN 1987A (Supernova 1987A). At the center, material ejected from the supernova forms a keyhole shape. Just to its left and right are faint crescents newly discovered by Webb. Beyond them an equatorial ring, formed from material ejected tens of thousands of years before the supernova explosion, contains bright hot spots. Science: NASA, ESA, CSA, Mikako Matsuura (Cardiff University), Richard Arendt (NASA-GSFC, UMBC), Claes Fransson (Stockholm University), Josefin Larsson (KTH); Image Processing: Alyssa Pagan (STScI)

This image of SN 1987A was taken using Webb’s NIRCam instrument, and it shows a central keyhole-shaped structure full of dust and gas that was thrown off by the dying star as it came to the end of its life. While Webb’s infrared instruments are useful for looking through dust to reveal structures beneath, in the very center of the remnantm the dust is so dense that even infrared light cannot penetrate it, hence the dark clump in the very center.

The rings of material around the center are seen in more detail too, like the bright dots, which are hotspots created by the shock wave from the supernova hitting previously cast-off rings of material.

Astronomers combined observations from three different observatories (Atacama Large Millimeter/submillimeter Array, red; Hubble, green; Chandra X-ray Observatory, blue) to produce this colorful, multiwavelength image of the intricate remains of Supernova 1987A.
Astronomers combined observations from three different observatories to produce this colorful, multiwavelength image of the intricate remains of Supernova 1987A. NASA, ESA, A. Angelich (NRAO, AUI, NSF); Hubble image: NASA, ESA, and R. Kirshner (Harvard-Smithsonian Center for Astrophysics and Gordon and Betty Moore Foundation) Chandra image: NASA/CXC/Penn State/K. Frank et al. ALMA image: ALMA (ESO/NAOJ/NRAO) and R. Indebetouw (NRAO/AUI/NSF)

As a famous supernova, SN 1987A has been previously observed many times before, including by space-based tools like the Hubble Space Telescope and the Chandra X-ray Observatory, as well as ground-based tools like the Atacama Large Millimeter/Submillimeter Array.

The image above shows a combination of data from these three observatories, which operate in the optical, X-ray, and radio wavelengths respectively. These observations show the same structures as the Webb image, but in less crisp detail — demonstrating how useful Webb’s instruments are for getting a fresh look at well-known objects.

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