Pluto probe is an exciting achievement for humanity.

The New Horizons probe to Pluto has sent back some exciting photos. The smallest planet in the solar system is also the coldest, -233 degrees Celsius. This makes it too cold to land on. A spacesuit would not last long in such cryogenic temperatures. But this is the furthest object that exists in the solar system. Seeing it up close answers many questions about the surface of the dwarf planet and the makeup of the surface. Life could exist on the surface theoretically if they had Helium II for blood. Here is a science fiction story that describes such life that eats the hydrocarbon materials on the surface for sustenance and can only move at night. Google books. Saturns moon Titan could also harbor life. The oceans of Titan are liquid Ethane, Methane and Propane. They could have some sort of organic materials and life swimming around in the super cold lakes. Even Jupiter could have life on the moons. Europa has an ocean of water underneath the ice. The bottom of which could have volcanic vents that spew hot water and gases. All life needs to exist. This is the case on Earth. Such life would be accustomed to the darkness and the super-heated water exiting the vents. Providing minerals and food for the lifeforms there.

Here is a good closeup of Pluto that shows some mountains on the surface. These are apparently 3 kilometers high. That is quite high for a small planet. Olympus Mons on Mars is 29 kilometers high, but that is a volcano. Why would Pluto be geologically active? Unless there is another large planet out past Pluto with a large gravitational pull that is tugging on Pluto and causing geologic shifts. Such a thing has been theorized and written about before. Such a planet would be incredibly cold and dark, the sun would only be a distant bright speck and there would be no perceptible warmth at all. There could even be two planets past the orbit of Pluto, these would be very dark and cold worlds indeed. Colder than we could imagine. Antartica and Siberia may be cold, but it is hard to imagine a surface temperature of -240 degrees Celsius or colder. There was a new dwarf planet discovered in the solar system, this orbits far out past the orbit of Pluto: https://www.newscientist.com/article/dn25301-new-dwarf-planet-hints-at-giant-world-far-beyond-pluto/. Very exciting news. Our solar system is bigger than we think. And there is a lot out there that is waiting to be found.

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