GJ504b is an exoplanet orbiting a sun-like star GJ 504, estimated to be three to six times more massive than Jupiter. It was directly observed as part of the SEEDS Project using the Subaru Telescope. The planet is faint, cold (about 500 K), and has a relatively clear atmosphere.
The James Webb Space Telescope has detected potential life-associated gases (dimethyl sulfide, dimethyl disulfide) in the atmosphere of planet K2-18b, but scientists urge caution and further investigation to rule out non-biological sources. The findings are considered a potentially revolutionary moment in the search for extraterrestrial life.
Astronomers using Webb's MIRI instrument have directly imaged Epsilon Indi Ab, a gas giant several times the mass of Jupiter located around 12 light-years away from Earth. This is one of the coldest exoplanets to be directly detected, with an estimated temperature of 2 degrees Celsius.
