The James Webb Space Telescope has captured a new, high-definition image of NGC 2392, commonly known as the Lion Nebula. This object earns its name from its physical resemblance to a lion's face. While the Hubble Space Telescope previously imaged the nebula in 2000, Webb uses a combination of Near-Infrared and Mid-Infrared data to show details previously obscured by gas and dust.
At the center of the structure sits a white dwarf, the remnant of a star that reached the end of its life cycle. This star acts as the nose of the lion, while the surrounding gas and dust clouds form the mane. The star remains intensely hot, ionizing the hydrogen gas within the bubble and forcing the structure to expand. As this material travels outward, it destroys much of the dust in its path, creating the ring-like shells visible in the new photographs.
Unlike massive stars that end their lives in supernova explosions, the star that formed the Lion Nebula followed a different path. It exhausted its fuel, became unstable, and gradually shed its outer layers. This process is a major source of observable dust in our universe. Webb's infrared instruments highlight compact clumps of surviving material that appear in shades of red, orange, and yellow.
These clumps serve as shields, protecting the material positioned behind them from the radiation emitted by the central star. The current appearance of the nebula is temporary. Astronomical projections indicate that the lionesque shape will disperse in approximately 10,000 years. Researchers continue to study the nebula to better understand the formation of these complex planetary shells.