Exoplanet Habitability

  title={Exoplanet Habitability},
  author={Sara Seager},
  pages={577 - 581}
  • S. Seager
  • Published 3 May 2013
  • Geology, Physics
  • Science
The search for exoplanets includes the promise to eventually find and identify habitable worlds. The thousands of known exoplanets and planet candidates are extremely diverse in terms of their masses or sizes, orbits, and host star type. The diversity extends to new kinds of planets, which are very common yet have no solar system counterparts. Even with the requirement that a planet’s surface temperature must be compatible with liquid water (because all life on Earth requires liquid water), a… 

Colloquium: Physical constraints for the evolution of life on exoplanets

Since the 1990s over 4000 exoplanets have been discovered: which of them could also develop and harbor life? It is posited that the planet must have liquid water, a surrounding atmosphere, and must

The search for signs of life on exoplanets at the interface of chemistry and planetary science

The exciting frontier for biosignature gas ideas is not in the study of biology itself, which is inevitably rooted in Earth’s geochemical and evolutionary specifics, but in the interface of chemistry and planetary physics.

What makes a planet habitable?

To focus the search for extraterrestrial life, scientists must assess which features of Earth are essential to the development and sustenance of life for billions of years and whether the formation of such planets is common.

Exploring Habitability Markers, Biosignatures, and Their False Positives Using Spectral Models of Terrestrial Exoplanets

Exploring Habitability Markers, Biosignatures, and Their False Positives Using Spectral Models of Terrestrial Exoplanets Edward W. Schwieterman Chair of the Supervisory Committee: Professor Victoria

Habitable zone lifetimes of exoplanets around main sequence stars.

The results show that exoplanet HD 85512b is no longer within the HZ, assuming it has an Earth analog atmosphere, and should be considered in future models of planetary habitability as setting an upper limit on the lifetime of any potential exoplanetary biosphere.

Exoplanet interiors and habitability

ABSTRACT More than 1000 exoplanets with a radius smaller than twice that of the Earth are currently known, mainly thanks to space missions dedicated to the search of exoplanets. Mass and radius

News Feature: The perfect planet

  • Adam Mann
  • Physics, Geology
    Proceedings of the National Academy of Sciences
  • 2016
Astronomers are at odds over what makes exoplanets “habitable.” These days, astronomers barely bat an eyelid when they find a new exoplanet: there have been nearly 2,000 discovered in the last 10

Direct imaging of exoplanets in the habitable zone with adaptive optics

One of the primary goals of exoplanet science is to find and characterize habitable planets, and direct imaging will play a key role in this effort. Though imaging a true Earth analog is likely out

Atmospheric Beacons of Life from Exoplanets Around G and K Stars

The powerful emission from rotational-vibrational bands of nitric oxide, hydroxyl and molecular oxygen are proposed to use as signatures of nitrogen, oxygen, and water rich atmospheres of terrestrial type exoplanets “highlighted” by the magnetic activity from young G and K main-sequence stars.

Potential long-term habitable conditions on planets with primordial H-He atmospheres

Cold super-Earths which retain their primordial, H-He dominated atmosphere could have surfaces that are warm enough to host liquid water. This would be due to the collision induced absorption (CIA)



The Limits of Organic Life in Planetary Systems

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