+**Planet Earth** is the third [planet](/wiki/planet) from the [Sun](/wiki/sun) and the only known astronomical object to harbor [life](/wiki/life). It is the densest planet in the [Solar System](/wiki/solar_system) and the largest of the four terrestrial planets. Its surface is unique, with vast oceans of liquid water and a protective atmosphere that sustains a diverse [biosphere](/wiki/biosphere).
+## See also
+- [Universe](/wiki/universe)
+- [Climate](/wiki/climate)
+- [Geography](/wiki/geography)
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