The discovery of a planet that is far too large for its sun defies models of solar system and planet formation. In an article published in Science, researchers report the discovery of a planet over thirteen times as heavy as Earth orbiting the ultra-cool dwarf star LHS 3154, which is nine times less massive than the Sun. The mass ratio of the newly discovered planet and its parent star is more than a hundred times higher than that of Earth and the Sun. One of the authors is Yamila Miguel (SRON/Leiden Observatory).
Article
A Neptune-mass exoplanet in close orbit around a very low mass star challenges formation models. Guðmundur Stefánsson et al. In Science. https://www.science.org/doi/10.1126/science.abo0233
