AI Insight
Astronomers using the James Webb Space Telescope observed the Jupiter-sized exoplanet WD 1856 b as it passed in front of its host star, a white dwarf. The planet was found to be warmer than predicted and orbits extremely close to the stellar remnant. Researchers determined the planet's mass, temperature, and detected its atmosphere, providing insights into how the planet survived its star's death and migrated to its current tight orbit.
Why it matters
This discovery offers the first observational evidence of what may happen to gas giant planets in our own solar system when the Sun eventually dies in several billion years. Understanding how planets can survive stellar death and orbital migration helps refine models of planetary system evolution and the long-term fate of worlds like Jupiter.
Understand the Science
An international team of astronomers has used the NASA/ESA/CSA James Webb Space Telescope to watch the Jupiter-sized exoplanet WD 1856 b transit its host star, measuring the planet’s mass and temperature and even detecting its atmosphere.
They found that the planet is significantly warmer than expected and determined how it most likely reached its very tight orbit around the star, a white dwarf. The results are our first window into the future of planets like Jupiter after the death of the Sun, billions of years into the future.
Source: Webb studies how a planet survived the death of its star