Results 291 to 300 of about 19,355 (320)

Habitable Planets with High Obliquities

Icarus, 1997
Earth's obliquity would vary chaotically from 0 degrees to 85 degrees were it not for the presence of the Moon (J. Laskar, F. Joutel, and P. Robutel, 1993, Nature 361, 615-617). The Moon itself is thought to be an accident of accretion, formed by a glancing blow from a Mars-sized planetesimal.
D M, Williams, J F, Kasting
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Habitable Planet, Characterization

2011
The spectrum of a planet can contain signatures of atmospheric species, which create its spectral fingerprint. The presence and abundance of atmospheric species, in the context of the properties of the star and the planet, can elucidate the underlying physics and characterize a planetary environment.
Lisa Kaltenegger, Franck Selsis
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Habitable planet finder

SPIE Proceedings, 2012
A notional space telescope configuration is presented that addresses issues of angular resolution, spectral bandwidth and rejection of host star glare by means of a double dispersion architecture. The telescope resolves angle by wavelength. In an earlier embodiment for surveys, a primary objective grating telescope architecture was shown to acquire ...
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Habitable Zone Limits for Dry Planets

Astrobiology, 2011
Most discussion of habitable planets has focused on Earth-like planets with globally abundant liquid water. For an "aqua planet" like Earth, the surface freezes if far from its sun, and the water vapor greenhouse effect runs away if too close. Here we show that "land planets" (desert worlds with limited surface water) have wider habitable zones than ...
Yutaka, Abe, Ayako, Abe-Ouchi, Norman H, Sleep, Kevin J, Zahnle   +3 more
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Host Star Evolution for Planet Habitability

Origins of Life and Evolution of Biospheres, 2016
With about 2000 exoplanets discovered within a large range of different configurations of distance from the star, size, mass, and atmospheric conditions, the concept of habitability cannot rely only on the stellar effective temperature anymore. In addition to the natural evolution of habitability with the intrinsic stellar parameters, tidal, magnetic ...
Gallet, Florian, Charbonnel, Corinne, Amard, Louis   +2 more
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Habitable moons around extrasolar giant planets

Nature, 1997
Possible planetary objects have now been discovered orbiting nine different main-sequence stars. These companion objects (some of which might actually be brown dwarfs) all have a mass at least half that of Jupiter, and are therefore unlikely to be hospitable to Earth-like life: jovian planets and brown dwarfs support neither a solid nor a liquid ...
D M, Williams, J F, Kasting, R A, Wade
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What makes a planet habitable?

Science, 2019
Efforts to identify habitable planets must look beyond atmospheres to planetary ...
Anat, Shahar, Peter, Driscoll, Alycia, Weinberger, George, Cody   +3 more
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Evolution of a Habitable Planet

Annual Review of Astronomy and Astrophysics, 2003
▪ Abstract  Giant planets have now been discovered around other stars, and it is only a matter of time until Earth-sized planets are detected. Whether any of these planets are suitable for life depends on their volatile abundances, especially water, and on their climates.
Kasting, JF, Catling, DC
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Evolution of a habitable planet

Geochimica et Cosmochimica Acta, 2006
■ Abstract Giant planets have now been discovered around other stars, and it is only a matter of time until Earth-sized planets are detected. Whether any of these planets are suitable for life depends on their volatile abundances, especially water, and on their climates. Only planets within the liquid-water habitable zone (HZ) can support life on their
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Pathways Towards Habitable Planets

2010
International ...
Coudé Du Foresto, Vincent, Gelino, Dawn M., Ribas, Ignasi   +2 more
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