New planet formation models indicate that at least one planet should form within the circumstellar habitable zone of single dwarf stars regardless of mass. Biogenic materials also appear to be widespread and delivery to terrestrial planets via cometary impacts may be a viable mechanism. Finally, ...
habitable zone n. The region in a stellar system where the surface temperatures of planets can sustain liquid water and therefore hold the highest probability for the existence of life. Also called Goldilocks zone. American Heritage® Dictionary of the English Language, Fifth Edition. Copyright ...
Encyclopedia pro·to·plan·e·tar·y disk (prō′tō-plăn′ĭ-tĕr′ē) n. A disk of gas and dust, often geometrically thin and opaque, orbiting a newly formed star, from which planets may eventually form. American Heritage® Dictionary of the English Language, Fifth Edition. Copyri...
We present a review of the interplay between the evolution of circumstellar disks and the formation of planets, both from the perspective of theoretical mo
Extrasolar planetsWe extend the circumstellar habitable zone to include deep subsurface biospheres.We derive a quantitative model for estimating HZs for deep biospheres.We present results for Earth-like, Mars-like and selected extrasolar planets.We show that HZs for deep biospheres include many more...
I use scaling arguments and previous results to derive a simple recipe that constrains which giant planet systems are able to form and harbor Earth-like planets in the Habitable Zone, demonstrating that roughly one third of the known planetary systems are potentially habitable.;Finally, I present ...
(redirected from Circumstellar Habitable Zones)Also found in: Medical. Related to Circumstellar Habitable Zones: Solar System Habitable Zone habitable zone n. The region in a stellar system where the surface temperatures of planets can sustain liquid water and therefore hold the highest probability fo...
Encyclopedia Related to Circumstellar disk:Circumstellar disc pro·to·plan·e·tar·y disk (prō′tō-plăn′ĭ-tĕr′ē) n. A disk of gas and dust, often geometrically thin and opaque, orbiting a newly formed star, from which planets may eventually form. ...
We apply these criteria to study the UV habitable zone for those extrasolar planetary systems that were observed by the International Ultraviolet Explorer (IUE). We analyze the possibility that extrasolar planets and moons could be suitable for life, according to the UV constrains presented in this...