TOI-4129 b is a low-density planet about 5.7 times Earth’s radius, orbiting its star every 3.27 days. Its orbit places it at the inner edge of the Neptune ridge, a concentration of intermediate-size planets with short orbital periods. The system’...

Updated James Webb Space Telescope images provide revised measurements of the position and brightness of the young giant planet HIP 65426 b. Its overall properties still fit a cloudy atmosphere and a temperature estimate of about 1,436 kelvins. A sea...