Habitable Zones & Global Climate

The Habitability Of Our Evolving Galaxy

The Habitability Of Our Evolving Galaxy

The notion of a Galactic Habitable Zone (GHZ), or regions of the Milky Way galaxy that preferentially maintain the conditions to sustain complex life, has recently gained attention due to the detection of numerous exoplanets and advances made in understanding habitability on the Earth and other environments.

Habitable Zones & Global Climate

The Habitable Zone of Kepler-16: Impact of Binarity and Climate Models

The Habitable Zone of Kepler-16: Impact of Binarity and Climate Models

We continue to investigate the binary system Kepler-16, consisting of a K-type main-sequence star, a red dwarf, and a circumbinary Saturnian planet. As part of our study, we describe the system's habitable zone based on different climate models.

Astrobiology (general)

Jennifer Eigenbrode Asks If We Are Alone in the Universe

Jennifer Eigenbrode Asks If We Are Alone in the Universe

Name: Jennifer Eigenbrode. Formal Job Classification: Research astrobiologist. Organization: Code 699, Planetary Environments Laboratory, Space Sciences Directorate

Habitable Zones & Global Climate

Impact of Gas Giant Instabilities on Habitable Planets

Impact of Gas Giant Instabilities on Habitable Planets

The detection of many extrasolar gas giants with high eccentricities indicates that dynamical instabilities in planetary systems are common. These instabilities can alter the orbits of gas giants as well as the orbits of terrestrial planets and therefore eject or move a habitable planet out of the habitable zone.

Plant Biology

Earth Plants Colonized Land 100 million Years Earlier Than Previously Thought

Earth Plants Colonized Land 100 million Years Earlier Than Previously Thought

For the first four billion years of Earth's history, our planet's continents would have been devoid of all life except microbes.

Venus

Modeling Venus-Like Worlds Through Time

Modeling Venus-Like Worlds Through Time

We explore the atmospheric and surface history of a hypothetical paleo-Venus climate using a 3-D General Circulation Model. We constrain our model with the in-situ and remote sensing Venus data available today.

Dale Andersen's Field Reports

Astrobiologist Dale Andersen Antarctic Status Report 15 February 2018: Heading Home

Astrobiologist Dale Andersen Antarctic Status Report 15 February 2018: Heading Home

Hi Keith: I am writing from sunny, warm, Cape Town, South Africa having arrived the night before last on the Il-76TD-90VD operated by Antarctic Logistics Centre International (ALCI).

Extrasolar Planets

Exoplanetary Atmosphere Target Selection in the Era of Comparative Planetology

Exoplanetary Atmosphere Target Selection in the Era of Comparative Planetology

Large-scale transit surveys such as NGTS, TESS and PLATO promise to deliver a wealth of potential targets for follow-up transmission spectroscopy study.

Habitable Zones & Global Climate

Different is More: The Value of Finding an Inhabited Planet that is Far From Earth 2.0

Different is More: The Value of Finding an Inhabited Planet that is Far From Earth 2.0

The search for an inhabited planet, other than our own, is a driver of planetary exploration in our solar system and beyond. Using information from our own planet to inform search strategies allows for a targeted search.

Astrochemistry

Extragalactic Archaeology With The C, N, and O Chemical Abundances

Extragalactic Archaeology With The C, N, and O Chemical Abundances

We predict how the C, N, and O abundances within the interstellar medium of galaxies evolve as functions of the galaxy star formation history (SFH).

Panspermia

Dynamical and Biological Panspermia Constraints Within Multi-planet Exosystems

Dynamical and Biological Panspermia Constraints Within Multi-planet Exosystems

As discoveries of multiple planets in the habitable zone of their parent star mount, developing analytical techniques to quantify extrasolar intra-system panspermia will become increasingly important.

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