In the past few years, significant advances have been made in understanding the
distributions of exoplanet populations and the architecture of planetary systems. We review …

This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky
Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the …

The Sloan Digital Sky Surveys (SDSS) have been almost continuously observing the skies
for over 20 yr, since the project began with a first phase in 1998 (SDSS-I; York et al. 2000) …

The Sun is magnetically active and often produces eruptive events on different energetic
and temporal scales. Until recently, the upper limit of such events was unknown and …

The population of small, close-in exoplanets is bifurcated into super-Earths and sub-
Neptunes. We calculate physically motivated mass–radius relations for sub-Neptunes, with …

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 …

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 …

Our understanding of the properties and demographics of exoplanets critically relies on our
ability to determine the fundamental properties of their host stars. The advent of Gaia and …

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

Exomoons represent a crucial missing puzzle piece in our efforts to understand extrasolar
planetary systems. To address this deficiency, we here describe an exomoon survey of 70 …