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Habitability of Planets and Moons
2018The author takes us to visit Saturn’s moon Titan, and Venus, Mars, and to the unconfirmed planet GJ581d. Although we find unearthly conditions on these bodies’ surfaces today, things were different in the past. Even now, there are oceans deep below Titan’s frozen ice shell that itself sees liquid methane rains and vast ethane-filled lakes.
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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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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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Host Star Evolution for Planet Habitability
Origins of Life and Evolution of Biospheres, 2016With 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 ...
Corinne Charbonnel +4 more
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Habitable Zone Limits for Dry Planets
Astrobiology, 2011Most 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 +3 more
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How to Assemble a Habitable Planet
2020Hydrogen is a colorless, odorless gas that, when given enough time, changes into people. How much time? 13.7 billion years! A good way to present the information in this book is to pose a question, provide an answer, and then go on to ask and...
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The Drake Equation and habitable planets [PDF]
, 2009 In 1960 Frank Drake devised an equation which expressed the number of intelligent communicating civilizations in the galaxy as the product of a number of probability factors, viz: N = N* fp ne fl fi fc fL where: N* is the number of stars in the galaxy fp is the fraction of stars that host planets ne is the number of planets per star capable of ...
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The search for habitable planets with biosignature gases framed by a ‘Biosignature Drake Equation’
International Journal of Astrobiology, 2017S. Seager
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