Observations While using the Hubble Space Telescope also suggest Europa provides a tenuous atmosphere of oxygen. The combination of drinking water, a heat source, and an environment raises the possibility that Europa harbors daily life. Rhea is the 2nd largest moon of Saturn. Rhea has a thin ambiance―called an exosphere―and https://best-moons71581.dgbloggers.com/35165941/helping-the-others-realize-the-advantages-of-bestmoons