Arguably some of the weirdest, most extreme planets among the more than 4,000 exoplanets discovered to date are the hot super-Earths—rocky, flaming-hot worlds that zing so precariously close to their host stars that some of their surfaces are likely melted seas of molten lava.
Source:
https://phys.org/news/2020-08-lava-oceans-brightness-hot-super-earths.html