Sub-Neptune planets, often billed as possible “water worlds,” may be more desert than deep sea, according to a new study. For years, scientists thought these planets, which are larger than Earth but smaller than Neptune, could form far from their stars, sweeping up ice beyond the so-called “snow line.” As the planets migrated inward, scientists have thought that ice might …
Read More »Is our dream of finding ocean-covered exoplanets drying up?
