Pluto and the Kiladze Ice Volcano
When I was in school, the solar system had nine planets. The Kuiper Belt was not mentioned, nor were dwarf planets or trans-Neptunian objects (TNOs). Pluto lost its planethood status because of its size; there is a passel of TNOs with Pluto being the first.
All of that stuff was expected to be geologically dead, but Pluto and its moons baffle deep time proponents with activity. There are volcanoes out yonder such as Jupiter's moon Io, and some that expel ice instead of lava. Pluto has some of these.
Artist's concept of New Horizons visiting Pluto, with moon Charon in the distance,: NASA/JHU APL/SwRI/Steve Gribben |
Dead. Cold. Dark. Small. Old, very old. Many such words have been used to describe the dwarf planet Pluto, which orbits the sun very far away. In fact, it is an average of about 40 times as far from the sun as Earth is (i.e., 40 AU, or astronomical units). Pluto is much smaller than other planets—and even smaller than the continental USA—so was ‘demoted’ from planet status in 2006. Many thought Pluto would then fade away silently in the public consciousness.
. . .
The spacecraft took the first detailed, close-up images of the surface of Pluto and its moon, Charon, while studying the composition of the dwarf planet. What it has found and continues to find has been surprising, inspiring, intriguing, and mind-blowing. Pluto is shocking the science world by not being cold, dark, dead, and all the similar adjectives used to describe it. The greatest surprise is that Pluto does not appear to be old.
You can read it all by clicking on "Pluto not done yet."