Tom A. Nordheim et al 2019 ApJL 881 L29
Particle physics simulations suggest that Europa is partially shielded from galactic cosmic rays by the Jovian magnetosphere, and the radiation dose due to these particles is small at Europa’s surface.
Jonathan Horner et al 2019 AJ 158 100
Detailed analysis of the orbital stability of the HD 181433 planetary system suggest previous measurements of its orbital properties may be incorrect; a different system architecture is necessary for it to be stable.
Evan N. Kirby et al 2019 ApJ 881 45
Measurements of abundances in dwarf-galaxy satellites of the Milky Way suggest that the dominant type of supernova Ia in ancient dwarf galaxies is the explosion of a sub-Chandrasekhar-mass white dwarf.
Juan A. Sanchez et al 2019 ApJL 881 L6
New photometric and spectroscopic data of main-belt asteroid (6478) Gault favor a compositional affinity between Gault and asteroid (25) Phocaea and rule out a compositional link with the Tamara family.
Nora Bailey and Daniel Fabrycky 2019 AJ 158 94
Gravitational scattering among planets in a system, combined with a close flyby of another star, may generate a population of “Oort” exoplanets that orbit at wide distances of 100 to 5,000 AU.
Aomawa L. Shields 2019 ApJS 243 30
This review summarizes the origins and evolution of the burgeoning field of exoplanet climatology, work to identify those planets most capable of supporting life, and offers a glimpse into future directions of the field.