NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute
Pluto might be made of a billion comets squashed together. Its chemical makeup hints that this might be its origin story, and that it may even have once had a liquid ocean.
Pluto is chock full of nitrogen. Currently, it is found in gas form in Pluto’s tenuous atmosphere, and in solid form in giant glacier made of nitrogen-rich ice, called Sputnik Planitia, which is found in the left lobe of Pluto’s heart-shaped plain.
“I would imagine …
–Credit: New Scientist – Home