GJ 1214b is another exoplanet that I found on 3 of the 4 lists. Some have nicknamed it ‘Waterworld’ since its discovery in December of 2009. It orbits a red dwarf star some 40-42 light years from us and is a ‘super Earth’, a planet whose mass is between Earth and Neptune. It is triple the size of Earth, but its mass is about 6.5 Earths.
Waterworld - as you might guess - is probably covered in water, reaching depths far deeper than Earth’s oceans. It is assumed to have a solid core, but the lists disagree about that core. One assumed the core would be made of rock, one simply said the core was ‘solid’, and the third stated that with an ocean that deep, the pressure and cold could have formed a core made of different forms of ice.
The depths of this ocean might be frigid, but not the atmosphere, which it definitely has. This planet’s air is described as ‘thick’ and ‘steamy’. It is thought to be home to water in a medley of phases, such as steam, liquid, and plasma. Maybe even ice, down in the core region. Another scientist said that Waterworld’s high temperatures and high pressures could form some exotic materials, such as ‘hot ice’ or ‘superfluid water’.
The possibility of ‘exotic forms of water’ makes me think of an episode from the original series of Star Trek. Small bits of a freakish form of water would ‘infect’ people and make them behave as if they were drunk, even to the point of committing suicide. For most of the episode, Dr McCoy and his team could not figure out what had gotten into the victims... all the tests just considered this stuff water. But in the end, of course, they got it figured out and devised an antidote. There was a very similar episode in ST The Next Generation.
Hmm. I wonder if ‘Waterworld’s ocean consists of salt water, or something more closely resembling fresh water. If the only thing solid is the core - which at the very least might well be covered in ice, if not composed of ice - then where would it get any salt?
And if the ocean is fresh water, what are the chances that it managed to produce any life? Probably not life as we know it, because we need a whole bunch of stuff besides the hydrogen and oxygen found in water. Stuff like iron, carbon and potassium, just to name a few.
Now, let’s all think about this and try to figure out how plain water might manage to create living creatures. And when we’re done with that, let’s tackle the intelligence question.