Mars

Digging Deeper Into Mars

Digging Deeper Into Mars

Water is the key to life on Earth. Scientists continue to unravel the mystery of life on Mars by investigating evidence of water in the planet's soil.

Astrochemistry

Chemical Enrichment of the Pre-Solar Cloud by Supernova Dust Grains

Chemical Enrichment of the Pre-Solar Cloud by Supernova Dust Grains

The presence of short-lived radioisotopes (SLRs) in solar system meteorites has been interpreted as evidence that the solar system was exposed to a supernova shortly before or during its formation.

Biosignatures & Paleobiology

Polarized Scattering and Biosignatures in Exoplanetary Atmospheres

Polarized Scattering and Biosignatures in Exoplanetary Atmospheres

Polarized scattering in planetary atmospheres is computed in the context of exoplanets. The problem of polarized radiative transfer is solved for a general case of absorption and scattering, while Rayleigh and Mie polarized scattering are considered as most relevant examples.

Astrochemistry

Exoplanet Atmospheric Chemistry on Paper

Exoplanet Atmospheric Chemistry on Paper

Normally computers speed up calculations. But with his new pen-and-paper formula Kevin Heng of the University of Bern gets his results thousands of times faster than using conventional computer codes.

Titan

A New Astrobiological Model of the Atmosphere of Titan

A New Astrobiological Model of the Atmosphere of Titan

We present results of an investigation into the formation of nitrogen-bearing molecules in the atmosphere of Titan.

Habitable Zones & Global Climate

Temperate Earth-sized Planets Transiting a Nearby Ultracool Dwarf Star

Temperate Earth-sized Planets Transiting a Nearby Ultracool Dwarf Star

Star-like objects with effective temperatures of less than 2,700 kelvin are referred to as ultracool dwarfs.

Extrasolar Planets

Night Side Cooling and Surface Friction Affect Climates of Tidally Locked Terrestrial Planets

Night Side Cooling and Surface Friction Affect Climates of Tidally Locked Terrestrial Planets

We investigate how night side cooling and surface friction impact surface temperatures and large scale circulation for tidally locked Earth-like planets.

Extrasolar Planets

Connecting Disk Astrochemistry to the Formation of Planetary Atmospheres

Connecting Disk Astrochemistry to the Formation of Planetary Atmospheres

We present a model of early planetary atmospheres which represents the cumulative gaseous chemical species that are accreted onto planets forming by core accretion from an evolving protoplanetary disk.

Astronomy

Effects of Proxima Centauri on Planet Formation in Alpha Centauri

Effects of Proxima Centauri on Planet Formation in Alpha Centauri

Proxima Centauri is an M dwarf approximately 15,000 AU from the Alpha Centauri binary, comoving and likely in a loosely bound orbit.

Habitable Zones & Global Climate

Surface Composition Determines Temperature and Therefore Habitability of a Planet

Surface Composition Determines Temperature and Therefore Habitability of a Planet

Astronomers at KU Leuven, Belgium, have shown that the interaction between the surface and the atmosphere of an exoplanet has major consequences for the temperature on the planet.

Astronomy

First Sighting Of A Water Snow Line Around A Young Star

First Sighting Of A Water Snow Line Around A Young Star

Young stars are often surrounded by dense, rotating discs of gas and dust, known as protoplanetary discs, from which planets are born.

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