Each of the several choices available in run 3 for selecting records at random from a database table comes with its own set of advantages and disadvantages. Depending on the specific requirements of the application, one of the methods can be more appropriate than the others.
I’m so looking forward to what JUICE uncovers! Europa has been centre stage and is getting its own dedicated mission, but the more we find out about those outer moons, the more fascinating they get. Ganymede is the largest in the solar system and has its own magnetic field. And Callisto being an ocean world? It wouldn’t surprise me if Ganymede is also.
They found that Callisto’s ionosphere alone cannot explain all existing observations, but that a subsurface ocean in combination with the ionosphere can. Further exploring which scenarios best fit the data, the researchers predicted that the ocean is likely at least tens of kilometers thick, as measured from the top of the liquid ocean to its seafloor, and encased beneath a solid ice shell that itself could range from tens to hundreds of kilometers thick.
Life on Callisto would have a worldview not unlike that of the Krikkiters.
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