Exploring Exoplanets: From Gaia Enceladus to Habitable Zones

The James Webb Space Telescope (JWST) has observed the HR 8799 solar system, located 133 light-years away, and detected four exoplanets using its MIRI instrument. The system is young and unique, with the four massive planets on wide orbits. The JWST's observations confirm that these planets are not brown dwarfs and provide insights into their temperatures and atmospheric compositions. The study also clarifies the nature of a background object in the system and highlights the challenges and potential of using the JWST's MIRI instrument for future observations of young exoplanetary systems.