venus very likely underwent a runaway or ‘moist’ greenhouse phase earlier in its history, and today is kept hot by a dense co2 atmosphere.
venus very likely underwent a runaway or ‘moist’ greenhouse phase earlier in its history, and today is kept hot by a dense co2 atmosphere.
venus:13
it may have had water oceans in the past, but these would have vaporized as the temperature rose due to a runaway greenhouse effect.