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Would a blue planet have previously been a planet like earth?

6 Answers
As in could a blue planet have once been a habitable planent, where people could have lived at some point?
P

I don't think so. A blue planet just signifies that a massive amount of water, as in oceans, occupy most of the planet but this does not mean that people may have lived in that planet in the past. A blue planet rather suggests that alien life may be possible since water is essential for organisms to survive. You also need to consider its distance from a star, i.e. the sun. If a planet is too near from the sun, everything will be scorched and no life would be possible to survive, if it's too far like Neptune (despite the planet being blue), organisms might not be able to survive the freezing cold. Hence, distance from a star is crucial to the survival of life forms.

To summarize, a blue planet does not mean a habitable planet. It only suggests that life is possible. There are many other factors to consider if life is indeed possible in other planets. Of course, alien life may be able to adapt in the most extreme environments, but our limited knowledge only allows us to infer from what we know of life here on earth.

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A

Many worlds are habitable. Yes it is possible, water bears(Tardigrada) survive in the most extreme environments, such as space and the ice at earths poles. There are over 100 species of Tarigrades. Neptune is very cold and very blue, it is believed that is has liquid water on it. Due to the gravitational pull of it's moons, it is believed to warp and crack, this friction causes the ice to melt and is evident in volcanic out gassing that occurs frequently and shoots water into the atmosphere turning to ice as it leaves the surface. Thank you for the question

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F

The question needs a few qualifications, sir (or madam). Uranus and Neptune are different shades of blue - yet they are not habitable by creatures like us. they may, however, be habitable by a form of life that can metabolize methane and use it to power biological systems. We currently are not aware specifically of such life; however, there are certain giant worms deep under the ocean that do not use oxygen, but hydrogen to function - so life is much more varied than us.

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D

For starters,neptune may be blue,but it is certaintly not habitable.It is a gas giant and the liquid part is methane at super freezing temperatures.If a living organism would have to live in neptune,it would have to survive the heat at the core and the freeze on its surface,super fast winds that whip across the planet at 3000kph and live on methane.

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S

A blue planet is likely to have oceans , the spawning ground of life , so , yes.
It is a possibility.

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A

Neptune is a blue planet, but it is not inhabitable.

Thank you for the question.

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