The rotation of a star and the revolutions of its planets are not necessarily aligned. This
article reviews the measurement techniques, key findings, and theoretical interpretations …

Exoplanets with substantial hydrogen/helium atmospheres have been discovered in
abundance, many residing extremely close to their parent stars. The extreme irradiation …

The distribution of planet sizes encodes details of planet formation and evolution. We
present the most precise planet size distribution to date based on Gaia parallaxes, Kepler …

A new piece of evidence supporting the photoevaporation-driven evolution model for low-
mass, close-in exoplanets was recently presented by the California–Kepler Survey. The …

Abstract NASA's Kepler Space Telescope was designed to determine the frequency of Earth-
sized planets orbiting Sun-like stars, but these planets are on the very edge of the mission's …

Various theoretical models treating the effect of stellar irradiation on planetary envelopes
predict the presence of a radius valley, ie a bimodal distribution of planet radii, with super …

An accurate and precise Kepler Stellar Properties Catalog is essential for the interpretation
of the Kepler exoplanet survey results. Previous Kepler Stellar Properties Catalogs have …

Abstract In 2017, the California-Kepler Survey (CKS) published its first data release (DR1) of
high-resolution optical spectra of 1305 planet hosts. Refined CKS planet radii revealed that …

Recent observations identify a valley in the radius distribution of small exoplanets, with
planets in the range 1.5–2.0 R⊕ significantly less common than somewhat smaller or larger …

Stars and planets both form by accreting material from a surrounding disk. Because they
grow from the same material, theory predicts that there should be a relationship between …