Added: Nov 21, 2008
From: h4ck3rm1k3
Duration: 1:7
The James M. DuPont Meteorite Collection - surface temperature must be high enough to allow liquid water to exist, but the temperature is controlled not only by the distance from the sun, but also by the composition of the atmosphere. If Venus, with its CO-rich atmosphere, were located in the asteroidal belt, it would have a comfortable surface temperature near 300° K., instead of the 600° K. prevailing at its present location. If it were not for the fact that the planetary hypothesis runs into so many other ditficulties (Anders and Goles, 1961), one could stop here. Of all the parent bodies discussed, the asteroids are least likely to retain liquid water at their surfaces, owing to their small size and consequent low escape velocities. But there is a way in which they could retain liquid water in their interiors. If the
Channel: Education
Tags: carbonaceous cyanobacteria fossils life meteorite
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