The James Webb Space Telescope recently captured new imagery of NGC 2392, a planetary nebula famously known as the Lion Nebula. This object sits in deep space, formed by the remnants of a dying star that expelled its outer layers thousands of years ago. By using near and mid-infrared cameras, researchers observed how the central white dwarf impacts its surroundings.
The nebula gets its name from its distinct shape, which resembles a lion face. The central white dwarf serves as the lion’s nose, while the surrounding gas and dust create a complex mane. Infrared light allows astronomers to see through thick dust clouds, providing a look at ionized gas and dense structures that remain hidden from visible light telescopes like Hubble.
At the center of this cosmic activity, the exposed stellar core emits intense radiation. This energy pushes material outward, creating shells of gas and dust. Some of these materials form compact clumps that block radiation, resulting in comet-like tails that make up the lion's mane. The star is essentially cooking the nebula from within, forcing the structure to change over time.
Astronomers note that this stage of stellar life is temporary. The material will continue to travel away from the center, and the entire structure will disperse into space in about 10,000 years. This brief timeframe in cosmic history shows how lower-mass stars influence their environment before fading into history. NASA, the European Space Agency, and the Canadian Space Agency continue to operate the telescope to map these stellar life cycles across the universe.