Turns out Venus is even weirder than we thought!
, this Venusian discovery stems from astronomers trying to understand the planet's surface, which unlike Earth does not have tectonic plates to explain where its heat goes.
Our planet's heat loss from its hot core is intimately tied to its tectonic plates. But because Venus demonstrably loses heat much the same way Earth does but lacks tectonic plates, planetary scientists have long questioned what exactly is causing it to lose its heat. Looking at data from NASA's Magellan mission to Venus in the early 1990s, the JPL researchers took a closer look at dozens of previously unstudied, or "quasi-circular geological features," when trying to figure out what's going on with the planet named for the Roman goddess of love — and found that those coronae tend to be where its lithosphere is thinnest, which would denote volcanic activity underneath.
"Just as a thin bedsheet releases more body heat than a thick comforter, a thin lithosphere allows more heat to escape from the planet’s interior via buoyant plumes of molten rock rising to the outer layer," the JPL blog post notes with terrific metaphorical aplomb.
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