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

Planets intermediate in size between the Earth and Neptune, and orbiting closer to their host
stars than Mercury does the Sun, are the most common type of planet revealed by exoplanet …

Exoplanets smaller than Neptune are common around red dwarf stars (M dwarfs), with those
that transit their host star constituting the bulk of known temperate worlds amenable for …

The exoplanet population characterized by relatively short orbital periods (P< 100 d) around
solar-type stars is dominated by super-Earths and sub-Neptunes. However, these planets …

We have collected transit times for the TRAPPIST-1 system with the Spitzer Space
Telescope over four years. We add to these ground-based, HST, and K2 transit-time …

The radius valley (or gap) in the observed distribution of exoplanet radii, which separates
smaller super-Earths from larger sub-Neptunes, is a key feature that theoretical models must …

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 …

The radii and orbital periods of 4,000+ confirmed/candidate exoplanets have been precisely
measured by the Kepler mission. The radii show a bimodal distribution, with two peaks …

Recent observations revealed a bimodal radius distribution of small, short-period exoplanets
with a paucity in their occurrence, a radius 'valley', around 1.5–2.0 R⊕. In this work, we …

The population of planets smaller than approximately 1.7 Earth radii (R⊕) is widely
interpreted as consisting of rocky worlds, generally referred to as super-Earths. This picture …