Earth (English name: Earth; Latin: Terra) is the third planet from the sun and the only celestial body known to harbor and support life. About 29.2 percent of the Earth's surface is land, consisting of continents and islands. The remaining 70.8 per cent is covered by water, mostly by oceans, bays and other brackish bodies of water, but also by lakes, glaciers, rivers and other freshwater bodies, most notably glaciers, which together form the hydrosphere.