Those worlds, though, are much too far away for us to explore directly.
Instead, our best hope is to look where liquid water likely exists in our solar system.
Wireless communication methods are on the table, including radio, acoustic, and magnetic transceivers.
An artist’s concept of a cryobot entering Europa’s subsurface ocean.Illustration: NASA/JPL-Caltech
Jupiters moon Europa and Saturns moon Enceladus are of particular interest for astrobiologists.
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