Results 11 to 20 of about 1,876 (134)

Extended Habitability of Exoplanets Due to Subglacial Water

The Astronomical Journal, 2023
Considering subglacial liquid water, a significant extension of the classical Habitable Zone is obtained. Elaborating on the model of Wandel it is shown how an atmosphere and liquid water could survive on tidally locked planets closely orbiting an M ...
Amri Wandel
doaj   +1 more source

Binary Gravitational Perturbations and Their Influence on the Habitability of Circumstellar Planets

Frontiers in Astronomy and Space Sciences, 2021
In order to assess the habitability of planets in binary star systems, not only astrophysical considerations regarding stellar and atmospheric conditions are needed, but orbital dynamics and the architecture of the system also play an important role. Due
Elke Pilat-Lohinger, Ákos Bazsó
doaj   +1 more source

The harsh environment where exoplanets live

Astronomische Nachrichten, Volume 343, Issue 4, May 2022., 2022
Abstract The X‐ray and Extreme Ultraviolet (XUV) actvity of the Sun has determined important effects on the planets around it. In particular, high doses of X‐rays, flares, and coronal mass ejections (CMEs) combined with masses and sizes of the planets and the shielding action of the planetary magnetic fields have determined the diverse habitability of ...
Ignazio Pillitteri
wiley   +1 more source

X-Ray-luminous Supernovae: Threats to Terrestrial Biospheres

The Astrophysical Journal, 2023
The spectacular outbursts of energy associated with supernovae (SNe) have long motivated research into their potentially hazardous effects on Earth and analogous environments.
Ian R. Brunton, Connor O’Mahoney, Brian D. Fields, Adrian L. Melott, Brian C. Thomas   +4 more
doaj   +1 more source

Hot Jupiters: Origins, Structure, Atmospheres

Journal of Geophysical Research: Planets, Volume 126, Issue 3, March 2021., 2021
Abstract We provide a brief review of many aspects of the planetary physics of hot Jupiters. Our aim is to cover most of the major areas of current study while providing the reader with additional references for more detailed follow‐up. We first discuss giant planet formation and subsequent orbital evolution via disk‐driven torques or dynamical ...
Jonathan J. Fortney, Rebekah I. Dawson, Thaddeus D. Komacek   +2 more
wiley   +1 more source

Vertically Resolved Magma Ocean–Protoatmosphere Evolution: H2, H2O, CO2, CH4, CO, O2, and N2 as Primary Absorbers

Journal of Geophysical Research: Planets, Volume 126, Issue 2, February 2021., 2021
Abstract The earliest atmospheres of rocky planets originate from extensive volatile release during magma ocean epochs that occur during assembly of the planet. These establish the initial distribution of the major volatile elements between different chemical reservoirs that subsequently evolve via geological cycles.
Tim Lichtenberg, Dan J. Bower, Mark Hammond, Ryan Boukrouche, Patrick Sanan, Shang‐Min Tsai, Raymond T. Pierrehumbert   +6 more
wiley   +1 more source

Multiverse Predictions for Habitability: Number of Potentially Habitable Planets

Universe, 2019
How good is our universe at making habitable planets? The answer to this depends on which factors are important for life: Does a planet need to be Earth mass? Does it need to be inside the temperate zone? are systems with hot Jupiters habitable? Here, we
McCullen Sandora
doaj   +1 more source

Oceans, Lakes, and Stromatolites on Mars

Advances in Astronomy, Volume 2020, Issue 1, 2020., 2020
Billions of years ago, the Northern Hemisphere of Mars may have been covered by at least one ocean and thousands of lakes and rivers. These findings, based initially on telescopic observations and images by the Mariner and Viking missions, led investigators to hypothesize that stromatolite fashioning cyanobacteria may have proliferated in the surface ...
Rhawn G. Joseph, Olivier Planchon, N. S. Duxbury, K. Latif, G. J. Kidron, L. Consorti, R. A. Armstrong, C. Gibson, R. Schild, Michael Kueppers   +9 more
wiley   +1 more source

The Habitable Zone and Extreme Planetary Orbits [PDF]

, 2012
The Habitable Zone for a given star describes the range of circumstellar distances from the star within which a planet could have liquid water on its surface, which depends upon the stellar properties.
Dawn M. Gelino, Dole S.H., Stephen R. Kane   +2 more
core   +2 more sources

Target Selection for the LBTI Exozodi Key Science Program [PDF]

, 2015
The Hunt for Observable Signatures of Terrestrial planetary Systems (HOSTS) on the Large Binocular Telescope Interferometer will survey nearby stars for faint emission arising from ~300 K dust (exozodiacal dust), and aims to determine the exozodiacal ...
Bailey, Vanessa P., Bryden, Geoff, Danchi, William C., Defrère, Denis, Haniff, Chris, Hinz, Philip M., Kennedy, Grant M., Mennesson, Bertrand, Millan-Gabet, Rafael, Rieke, George, Roberge, Aki, Serabyn, Eugene, Skemer, Andrew J., Stapelfeldt, Karl R., Weinberger, Alycia J., Wyatt, Mark C.   +15 more
core   +4 more sources