Many objects in the solar system hold significant reserves, but they are often locked away in ice sheets, subsurface oceans, or frozen permafrost rather than open lakes and seas. When looking at Earth from space, the planet’s blue sheen is impossible to ignore.
Exploring the Depths of Europa's Subsurface Ocean
These distant worlds transform our understanding of where water can exist, suggesting that the solar system is far wetter than it initially appears. The Verdict on Volume So, what planet has the most water ? If the metric is strictly liquid water on the surface, Earth wins by a landslide.
Comets: These cosmic snowballs are composed of up to 50% water ice, delivering the substance to inner planets during their periodic passes through the inner solar system. 3 billion cubic kilometers of H₂O.
Exploring the Depths of Europa's Subsurface Ocean
While the surface is a smooth crust of ice, scientists strongly believe a global ocean of liquid water lies beneath, kept in a molten state by tidal heating. Approximately 71% of the planet’s surface is covered by oceans, holding an estimated 1.
More About What planet has the most water
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