What are sub-Neptunes? With Dr Gaia Lacedelli

Sub-Neptunes are among the most common planets we know of, yet we still do not really know what they are. In this episode, Jeni and Lorenzo are joined by Gaia to explore these mysterious worlds: are they rocky planets wrapped in thick atmospheres, water-rich worlds, or something else entirely? We talk about how projects like THIRSTY, JWST and Ariel are helping astronomers piece together their origins, atmospheres and evolution.