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Earth from en.m.wikipedia.org
Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being a water world, the only one in ...
Earth from science.nasa.gov
We observe our planet's oceans, land, ice, and atmosphere, and measure how a change in one drives change in others. We develop new ways to observe and study ...
Earth from www.britannica.com
With an equatorial radius of 6,378 km (3,963 miles), Earth is the largest of the four inner, terrestrial (rocky) planets, but it is considerably smaller than ...