Sentences with phrase «dense early atmosphere»

This creates a stumbling block for those who thought the solution to the faint sun paradox lay in a dense early atmosphere.

Not exact matches

Indeed, a study in 2006 suggested that Mars may have gone through an acidic phase, triggered by active volcanism, after an early period in which it had a denser atmosphere and large bodies of neutral - pH water on its surface.

Planets that are smaller (i.e. 1.5 Earth radii or less) or have less hydrogen and helium early in their lives turn into dense, rocky planets with solid surfaces, while larger planets or those with more gas turn into Neptune - like planets with no discernable solid surface and thick atmospheres.

Born in Oregon in 1922, his dense early abstract paintings have the atmosphere of Paul Cezanne's great works and are distinctly European.

The shortwave extreme ultraviolet flux is much higher in the distant past, which could pose problems for early Mars to develop a very dense CO2 atmosphere early on for example, since C and O could escape from Mars early in its history (driven by these energetic wavelengths).

Venus very likely underwent a runaway or «moist» greenhouse phase earlier in its history, and today is kept hot by a dense CO2 atmosphere.