Planets tend to cool as they get older, scientists

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NEW YORK: Scientists have long known that planets tend to cool as they get older. That makes sense, considering the incredible chemical reactions that will likely occur when elements come together to form new stars and planets and entire solar systems.
But knowing that, scientists now wonder about Saturn because it seems like it should be much cooler than it is now. This realization literally puts a kink in our two-billion-year-old discrepancy within computer models which estimate the age of the planet.
According to Thomas Mattson, the manager of a high-energy-density physics theory group regarding the Sandia machine, “Models that correctly predict Jupiter to be 4.5 billion years old.”
The Sandia Z machine has verified an 80-year-old theory that molecular hydrogen—which is normally an insulator—can become metallic when put under enough atmospheric pressure.
Furthermore, Sandia researcher Mike Desjarlais says, “That long-ago prediction would explain Saturn’s temperature because, when hydrogen metallizes and mixes with helium in a dense liquid, it can release helium rain.”