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 …

Hot Jupiters were the first exoplanets to be discovered around main sequence stars and
astonished us with their close-in orbits. They are a prime example of how exoplanets have …

The basic geometry of the Solar System—the shapes, spacings, and orientations of the
planetary orbits—has long been a subject of fascination as well as inspiration for planet …

Studies of exoplanet demographics require large samples and precise constraints on
exoplanet host stars. Using the homogeneous Kepler stellar properties derived using the …

Abstract Observing the Rossiter–McLaughlin effect during a planetary transit allows the
determination of the angle λ between the sky projections of the star's spin axis and the …

Flare events are mainly due to magnetic reconnection and thus are indicative of stellar
activity. The Kepler Space Observatory records numerous stellar activities with …

We present a new transit timing catalog of 2599 Kepler Objects of Interest (KOIs), using the
PDC-MAP long-cadence light curves that include the full 17 quarters of the mission …

The Rossiter-McLaughlin effect occurs during a planet's transit. It provides the main means
of measuring the sky-projected spin-orbit angle between a planet's orbital plane, and its host …

We combine stellar surface rotation periods determined from NASA's Kepler mission with
spectroscopic temperatures to demonstrate the existence of pileups at the long-period and …

Misalignments between planetary orbits and the equatorial planes of their host stars are
clues about the formation and evolution of planetary systems. Earlier work found evidence …