Exoplanet orbiting dead star could show our solar system’s fate

Key Points:

• Astronomers studied WD 1856 b, a Jupiter-sized planet closely orbiting a white dwarf star, revealing it survived its host star's violent death and now orbits just 2 million miles away, completing an orbit every 34 hours.
• Using the James Webb Space Telescope, researchers found WD 1856 b is 4 to 11 times Jupiter's mass, has a temperature around 260°F (127°C), and possesses an atmosphere rich in methane and clouds, indicating it did not undergo engulfment by the star.
• Two theories explain the planet’s migration: it either survived being engulfed during the star’s red giant phase or was pushed inward later by gravitational interactions; current data favors the latter scenario, with heating occurring about 1 billion years ago.
• The WD 1856 system offers insights into the future of our solar system, suggesting that gas giants like Jupiter and Saturn may survive the sun’s transformation into a white dwarf and continue evolving for billions of years.
• While some scientists urge caution regarding interpretations of the planet’s temperature and atmospheric composition, the findings highlight the potential for giant planets to endure and maintain dynamic orbits after their host stars die.