Venus

Consequences Of Tidal Dissipation In A Putative Venusian Ocean

Consequences Of Tidal Dissipation In A Putative Venusian Ocean

The solar tide in an ancient Venusian ocean is simulated using a dedicated numerical tidal model. Simulations with varying ocean depth and rotational periods ranging from -243 to 64 sidereal Earth days are used to calculate the tidal dissipation rates and associated tidal torque.

Habitable Zones & Global Climate

The Habitability Of Stagnant-lid Earths Around Dwarf Stars

The Habitability Of Stagnant-lid Earths Around Dwarf Stars

The habitability of a planet depends on various factors, such as delivery of water during the formation, the co-evolution of the interior and the atmosphere, as well as the stellar irradiation which changes in time.

Habitable Zones & Global Climate

The Trail Of Water And The Delivery Of Volatiles To Habitable Planets

The Trail Of Water And The Delivery Of Volatiles To Habitable Planets

Water is fundamental to our understanding of the evolution of planetary systems and the delivery of volatiles to the surfaces of potentially habitable planets.

Exploration Science & Technology

Toward Finding Earth 2.0: Masses And Orbits Of Small Planets With Extreme Radial Velocity Precision

Toward Finding Earth 2.0: Masses And Orbits Of Small Planets With Extreme Radial Velocity Precision

Having discovered that Earth-sized planets are common, we are now embarking on a journey to determine if Earth-like planets are also common.

Habitable Zones & Global Climate

Earth's Magnetic Field May Be Responsible For Its Water

Earth's Magnetic Field May Be Responsible For Its Water

A study by scientists at The Australian National University (ANU) on the magnetic fields of planets has found that most planets discovered in other solar systems are unlikely to be as hospitable to life as Earth.

Habitable Zones & Global Climate

The Super-Earth Opportunity - Search for Habitable Exoplanets in the 2020s

The Super-Earth Opportunity - Search for Habitable Exoplanets in the 2020s

The recent discovery of a staggering diversity of planets beyond the Solar System has brought with it a greatly expanded search space for habitable worlds.

Biosignatures & Paleobiology

Remote Detectability of Earth's Biosphere Through Time

Remote Detectability of Earth's Biosphere Through Time

Thousands of planets beyond our solar system have been discovered to date, dozens of which are rocky in composition and are orbiting within the circumstellar habitable zone of their host star.

Habitable Zones & Global Climate

Exoplanet Exergy: Why Useful Work Matters For Planetary Habitabilty

Exoplanet Exergy: Why Useful Work Matters For Planetary Habitabilty

The circumstellar habitable zone and its various refinements serves as a useful entry point for discussing the potential for a planet to generate and sustain life.

TRAPPIST-1

Tides Between The TRAPPIST-1 Planets

Tides Between The TRAPPIST-1 Planets

The TRAPPIST-1 system is sufficiently closely packed that tides raised by one planet on another are significant. We investigate whether this source of tidal heating is comparable to eccentricity tides raised by the star.

Europa

A Magnetically Driven Equatorial Jet in Europa's Ocean

A Magnetically Driven Equatorial Jet in Europa's Ocean

During recent decades, data from space missions have provided strong evidence of deep liquid oceans underneath a thin outer icy crust on several moons of Jupiter, particularly Europa.

Astronomy

Near-Earth Supernova Explosions: Evidence, Implications, and Opportunities

Near-Earth Supernova Explosions: Evidence, Implications, and Opportunities

There is now solid experimental evidence of at least one supernova explosion within 100 pc of Earth within the last few million years, from measurements of the short-lived isotope 60Fe in widespread deep-ocean samples, as well as in the lunar regolith and cosmic rays.

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