The Webb Telescope Observes a Giant Planet Rapidly Losing Its Atmosphere.

According to ТСН: The James Webb Space Telescope (JWST) has observed a unique phenomenon: the gas giant WASP-107b, which has an extremely light mass, is actively losing its atmosphere. This planet, nearly the size of Jupiter, leaves behind a large trail of helium that spans an area five times its diameter.

This evaporation opens up opportunities for scientists to explore why exoplanets lose their gas envelopes. The results of the study were published in the journal Nature Astronomy.

The Phenomenon of the 'Ultra-Light' Giant

WASP-107b was discovered in 2017 and belongs to a special class of exoplanets.

With a diameter that is 94% that of Jupiter, its mass is only 12% of Jupiter's mass, making this planet one of the lightest among known gas giants.

The planet is located very close to its star — at a distance seven times smaller than that between the Sun and Mercury. This proximity makes it vulnerable to the star's thermal influence.

JWST observations confirmed that the atmosphere is not just leaking out but actually 'tearing' away from the surface at such a speed that it outpaces the planet's orbital movement. The gigantic trail of helium leads WASP-107b by more than an hour during transit.

Unexpected Chemical Discoveries

Studying the atmosphere of WASP-107b during its transit in front of the star revealed various volatile substances: water vapor, carbon monoxide, and carbon dioxide, ammonia. However, the results obtained contradict theoretical predictions.

No methane was detected in the atmosphere, which was expected to be present according to calculations. This indicates intense vertical mixing that erodes the methane-poor hot layers from below.

Spectroscopic data indicated an increased concentration of oxygen. This does not match the models of planets that formed in the hot inner regions of the system.

Planetary Evolution and Its Significance

The results of the research indicate a complex evolutionary history for WASP-107b.

The signals of hot vertical mixing and the increased oxygen content suggest that the planet may have formed far from the star (possibly beyond the 'frost line') and then migrated inward under the influence of a massive celestial body.

Studying WASP-107b helps not only to unravel the evolution of exoplanets but also to understand the history of the planets in our Solar System, including possible mechanisms of water loss that may have occurred with Venus.

There have always been many questions surrounding exoplanet research. Discoveries such as WASP-107b open new horizons for scientists and provide material for future observations, elevating our understanding of planetary evolution to a new level. This research may allow for better comprehension of how gas giants form and change under the influence of their stars, which in turn could provide valuable insights for studying other planets in different stellar systems.