The prospects for the habitability of M-dwarf planets have long been debated, due to key
differences between the unique stellar and planetary environments around these low-mass …

Abstract Study Analysis Group 21 (SAG21) of NASA's Exoplanet Exploration Program
Analysis Group was organized to study the effect of stellar contamination on space-based …

The second Gaia data release (Gaia DR2) contains, beyond the astrometry, three-band
photometry for 1.38 billion sources. One band is the G band, the other two were obtained by …

Context. The third Gaia data release (Gaia DR3) contains, beyond the astrometry and
photometry, dispersed light for hundreds of millions of sources from the Gaia prism spectra …

An accurate and precise Kepler Stellar Properties Catalog is essential for the interpretation
of the Kepler exoplanet survey results. Previous Kepler Stellar Properties Catalogs have …

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 …

We present empirical measurements of the radii of 116 stars that host transiting planets.
These radii are determined using only direct observables—the bolometric flux at Earth, the …

Determining whether Earth-like planets are common or rare looms as a touchstone in the
question of life in the universe. We searched for Earth-size planets that cross in front of their …

Classification of stars, by comparing their optical spectra to a few dozen spectral standards,
has been a workhorse of observational astronomy for more than a century. Here, we extend …

Studies, have shown that the remnants of destroyed planets and debris-disk planetesimals
can survive the volatile evolution of their host stars into white dwarfs,, but few intact planetary …