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TagNatalie Elliot

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Why the Search for ET Now Focuses on Oceans in the Outer Planets

Some researchers are refining their ET life-tracking skills

The moons of the outer planets, research shows, have vast oceans and water is an essential ingredient of life as we know it. Natalie Elliot, a science writer with a specialty in astrobiology, explains, The hottest spots in the search for alien life are a few frigid moons in the outer solar system, each known to harbor a liquid-water ocean beneath its icy exterior. There is Saturn’s moon Titan, which hides a thick layer of briny water beneath a frozen surface dotted with lakes of liquid hydrocarbon. Titan’s sister Saturnian moon Enceladus has revealed its subsurface sea with geyserlike plumes venting from cracks near its south pole. Plumes also emanate from a moon that is one planet closer to the…