02-20-2020, 12:31 AM
(02-19-2020, 09:33 PM)Will the Wanderer Wrote: Astronomer, you seem like the right person to ask this. Water worlds, or giant liquid worlds like described here are news to me. Are these a relatively new idea or have they been around? Has the OA delved into these much?
I assume they're not exactly new. The idea is probably around for quite a long while, maybe at least a decade, but only after Kepler starts revealing the planetary demographics do we learn that many planets are super-Earths and sub-Neptunes. We don't have those in OA, so we don't see many of them in OA as a result. More at here for figuring out what these planets may be like, and here for planetary abundances.