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 …

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 …

The ExoMol database (www. exomol. com) provides molecular data for spectroscopic
studies of hot atmospheres. These data are widely used to model atmospheres of …

Ultrahot giant exoplanets receive thousands of times Earth's insolation 1, 2. Their high-
temperature atmospheres (greater than 2,000 kelvin) are ideal laboratories for studying …

Hot gas giant exoplanets can lose part of their atmosphere due to strong stellar irradiation,
and these losses can affect their physical and chemical evolution. Studies of atmospheric …

The temperature of an atmosphere decreases with increasing altitude, unless a shortwave
absorber that causes a temperature inversion exists. Ozone plays this role in the Earth's …

To constrain the formation history of an exoplanet, we need to know its chemical
composition,–. With an equilibrium temperature of about 4,050 kelvin, the exoplanet KELT …

Population studies of exoplanets are key to unlocking their statistical properties. So far, the
inferred properties have been mostly limited to planetary, orbital, and stellar parameters …

We present one of the most precise emission spectra of an exoplanet observed so far. We
combine five secondary eclipses of the hot Jupiter WASP-18b (T day∼ 2900 K) that we …

Extremely irradiated hot Jupiters, exoplanets reaching dayside temperatures> 2000 K,
stretch our understanding of planetary atmospheres and the models we use to interpret …