James Webb captures a cosmic lion sculpted by a dying star
James Webb has captured a striking new infrared view of NGC 2392, the Lion Nebula, revealing the dramatic aftermath of a dying Sun-like star. At its center, a scorching white dwarf is blasting radiation into surrounding gas and dust, carving out the nebula’s lion-like face while illuminating a sprawling “mane” of surviving dusty clumps.
The James Webb Space Telescope has unveiled new infrared images of the planetary nebula NGC 2392, also known as the Lion Nebula, showcasing intricate details unseen by the Hubble Space Telescope. The lion-shaped nebula, with a mane reminiscent of comet tails, is formed by the remnants of a dying star. While the overall structure appears similar in both observations, Webb's high-resolution instruments reveal dense dust concentrations and ionized gas regions that are difficult to discern in visible light.
At the heart of the nebula lies the stellar remains of a dying star, whose radiation drives the complex structures surrounding it. When a lower-mass star exhausts its nuclear fuel, it becomes unstable and sheds its outer layers, creating a planetary nebula. The intense radiation from the exposed stellar core pushes the expelled material outward, forming a bubble of ionized gas.
Within the nebula's mane, compact clumps of dust shield surrounding material from the star's intense radiation. Over time, the nebula will disperse as gas and dust continue to travel away from the central stellar remnant. The Lion Nebula is expected to disappear within approximately 10,000 years on astronomical timescales.
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