That's all granted, but the fact remains our best mathematical models place the likelihood of liquid oceans as being relatively high. That is not an ultimate conclusion as all these models are tentative, but we have more reason that not to suspect that is the case. I agree that it is far from enough to make a conclusion, that's why nobody has. The Spectroscopy data that will be available in the next few years has the potential to substantiate or dis confirm our suspicions about the composition of this planet, and while that too will not be enough to fully confirm the existence of life on the planet, it will go a long way towards raising the likelihood.
As for Venus, it was believed to have once been in the goldilocks zone, this is no longer the case, unlike 581g which most certainly is in this zone.
Also, 581g does not have an unstable orbit, the aphelion/perihelion is around 0.3 (earth is 0.2), and while it is possible that it's orbit has evened out over time this is unlikely.
All of the conditions we currently know about support the idea of liquid oceans even though it is by no means necessarily the case. Like i said this will only be made more or less likely with the arrival of impending data, the likes of which won't help us to reach any real conclusion on the matter.
As for Venus, it was believed to have once been in the goldilocks zone, this is no longer the case, unlike 581g which most certainly is in this zone.
Also, 581g does not have an unstable orbit, the aphelion/perihelion is around 0.3 (earth is 0.2), and while it is possible that it's orbit has evened out over time this is unlikely.
All of the conditions we currently know about support the idea of liquid oceans even though it is by no means necessarily the case. Like i said this will only be made more or less likely with the arrival of impending data, the likes of which won't help us to reach any real conclusion on the matter.
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