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How does this square with the fact that we have solid evidence of water on Mars as well?
by akk0 1y ago
How does this square with the fact that we have solid evidence of water on Mars as well?
- lukan 1y agoHaving some water and having lots of water is a slight difference. The most arid dessert on earth is a jungle compared to Mars. (Also Mars could have been also hit.)
- oceanplexian 1y agoExcept Titan likely has more water on it than Earth. Therefore unless we’re a fluke of a solar system planetary bodies with water on them should be extremely common.
- deleted 1y ago[deleted]
- addaon 1y agoTitan is outside the frost line. There’s no question that there’s a huge amount of water in solar systems, the question is if there’s a consistent transport system (comets, in this case) that moves it inside the frost line to where liquid water can, given an atmosphere and gravity, exist in conditions that match our familiar conditions for life.
- lukan 1y agoTitan is interesting, but much further away from the sun, so different conditions. We want earthlike conditions, life that can sustain on anything else, is just hypothesis so far. (As is the claim from the article)
- munchler 1y agoThe article mentions that the inner planets were initially too hot to retain water, but presumably Titan didn’t have that problem, being much farther from the sun.
- hn_throwaway_99 1y agoMars is further out in the solar system, and I'm assuming it was further out than Theia when the collision occurred. The article doesn't say no planets can have water, but just that originally Earth was too close to the Sun to have liquid water. Theia, according to this hypothesis, was not.
- gitaarik 1y agoAnd also Saturn's moon Europa