That massive a planet might have a thick enough atmosphere to compensate for its distance from the star?
e.g. Wasn't Mars 'warm' for quite a long time and only became really cold once it lost most of its atmosphere due to its small mass?
e.g. Wasn't Mars 'warm' for quite a long time and only became really cold once it lost most of its atmosphere due to its small mass?
Someone in the know correct me if I'm wrong, but I believe this is no longer the main theory, as solar wind ablation is too slow to make such a huge impact. I believe the popular explanation now is that geological reactions, i.e. gas reacting with rocks and being sequestered, played a larger part.
https://www.nasa.gov/press-release/nasas-maven-reveals-most-... "The new result reveals that solar wind and radiation were responsible for most of the atmospheric loss on Mars, and the depletion was enough to transform the Martian climate."