A newly found super-Earth could help provide answers as to why there are hardly any planets twice the diameter of Earth.

Scientists using the James Webb Space Telescope (JWST) have mapped the weather on a planet 280 light-years from Earth — a hot gas giant with one side permanently facing its sun and the other ...

stellar radiation blows their atmosphere away, removing much of the gas and leaving a smaller world at the end of the process. The other possibility is that it is leftover heat from a planet's ...