Explanation: Welcome to Planet Earth, the third planet from a star named the Sun. The Earth is shaped like a sphere and composed mostly of rock. Over 70 percent of the Earth's surface is water. The planet has a relatively thin atmosphere composed mostly of nitrogen and oxygen. Earth has a single large Moon which is about 1/4 of its diameter and, from the planet's surface, is seen to have almost exactly the same angular size as the Sun. With its abundance of liquid water, Earth supports a large variety of life forms, including potentially intelligent species such as dolphins and humans. Please enjoy your stay on Planet Earth.

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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Publikacii s klyuchevymi slovami: Zemlya - zhizn' vo Vselennoi Publikacii so slovami: Zemlya - zhizn' vo Vselennoi
Sm. takzhe: Protivosumerechnye luchi i festival' planet Voshod Zemli: video Udarnyi krater Manikuagan: vid iz kosmosa Zemlya i Luna: vid s drugoi storony Snezhnaya burya 1938 goda v Verhnem Michigane Polet nad nochnoi Zemlei – II Tihohodka na mhe Vse publikacii na tu zhe temu >>