Extrasolar Planets

Generic Models for Disk-Resolved and Disk-Integrated Phase Dependent Linear Polarization of Light Reflected from Exoplanets

Generic Models for Disk-Resolved and Disk-Integrated Phase Dependent Linear Polarization of Light Reflected from Exoplanets

Similar to the case of solar system planets, reflected starlight from exoplanets is expected to be polarized due to atmospheric scattering and the net disk integrated polarization should be non-zero owing to the asymmetrical illumination of the planetary disk.

Titan

Optimisation of a Hydrodynamic SPH-FEM Model for a Bioinspired Aerial-aquatic Spacecraft on Titan

Optimisation of a Hydrodynamic SPH-FEM Model for a Bioinspired Aerial-aquatic Spacecraft on Titan

Titan, Saturn's largest moon, supports a dense atmosphere, numerous bodies of liquid on its surface, and as a richly organic world is a primary focus for understanding the processes that support the development of life.

Biosignatures & Paleobiology

Scientists Detect Signatures Of Life Remotely

Scientists Detect Signatures Of Life Remotely

It could be a milestone on the path to detecting life on other planets: Scientists under the leadership of the University of Bern and of the National Centre of Competence in Research (NCCR) PlanetS detect a key molecular property of all living organisms from a helicopter flying several kilometers above ground. The measurement technology could also open up opportunities for remote sensing of the Earth.

Astrogeology

The Earth Has A Pulse

The Earth Has A Pulse

Geologic activity on Earth appears to follow a 27.5-million-year cycle, giving the planet a "pulse," according to a new study published in the journal Geoscience Frontiers.

Space Weather

Modeling The Corona And XUV Emission Of The Sun And Sun-like Stars

Modeling The Corona And XUV Emission Of The Sun And Sun-like Stars

The X-ray and extreme-ultra-violet (EUV) emissions from the low-mass stars significantly affect the evolution of the planetary atmosphere. It is, however, observationally difficult to constrain the stellar high-energy emission because of the interstellar extinction.

Space Weather

The Give And Take Of Mega-flares From Stars

The Give And Take Of Mega-flares From Stars

The long relationships between stars and the planets around them - including the Sun and the Earth - may be even more complex than previously thought. This is one conclusion of a new study involving thousands of stars using NASA's Chandra X-ray Observatory.

Habitable Zones & Global Climate

Possibilities for an Aerial Biosphere in Temperate Sub Neptune-Sized Exoplanet Atmospheres

Possibilities for an Aerial Biosphere in Temperate Sub Neptune-Sized Exoplanet Atmospheres

The search for signs of life through the detection of exoplanet atmosphere biosignature gases is gaining momentum. Yet, only a handful of rocky exoplanet atmospheres are suitable for observation with planned next-generation telescopes.

Climate

Microbes In Earth's Ocean Play An Important Role In Moderating Earth's Temperature

Microbes In Earth's Ocean Play An Important Role In Moderating Earth's Temperature

Methane is a strong greenhouse gas that plays a key role in Earth's climate. Anytime we use natural gas, whether we light up our kitchen stove or barbeque, we are using methane.

Biosignatures & Paleobiology

A Large-scale Approach to Modelling Molecular Biosignatures: The Diatomics

A Large-scale Approach to Modelling Molecular Biosignatures: The Diatomics

This work presents the first steps to modelling synthetic rovibrational spectra for all molecules of astrophysical interest using the new code Prometheus.

International Space Station

Space Botany and Biology Studies Under Way On The ISS

Space Botany and Biology Studies Under Way On The ISS

The orbiting lab is hosting a variety of life forms to help researchers understand how weightlessness affects biology. Observations provide insights often advancing health and improving conditions for humans on and off the Earth.

Fossils

Fossil Secret May Shed Light On The Diversity Of Earth's First Animals

Fossil Secret May Shed Light On The Diversity Of Earth's First Animals

A large group of iconic fossils widely believed to shed light on the origins of many of Earth's animals and the communities they lived in may be hiding a secret.

More top stories from June.