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 astrophysical origin of gravitational wave (GW) events discovered by LIGO/VIRGO
remains an outstanding puzzle. In active galactic nuclei (AGNs), compact-object binaries …

The hierarchical triple-body approximation has useful applications to a variety of systems
from planetary and stellar scales to supermassive black holes. In this approximation, the …

Nuclear star clusters around a central massive black hole (MBH) are expected to be
abundant in stellar black hole (BH) remnants and BH–BH binaries. These binaries form a …

Over the course of the past two decades, observational surveys have unveiled the intricate
orbital structure of the Kuiper Belt, a field of icy bodies orbiting the Sun beyond Neptune. In …

We assess the contribution of dynamical hardening by direct three-body scattering
interactions to the rate of stellar-mass black hole binary (BHB) mergers in galactic nuclei. We …

With the hundreds of merging binary black hole (BH) signals expected to be detected by
Laser Interferometer Gravitational-Wave Observatory (LIGO)/Virgo, Laser Interferometer …

Hierarchical triples are expected to be produced by the frequent binary-mediated
interactions in the cores of globular clusters. In some of these triples, the tertiary companion …

Abstract The Lidov–Kozai (LK) mechanism plays an important role in the secular evolution of
many hierarchical triple systems. The standard LK mechanism consists of large-amplitude …