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An Earth mass (denoted as M 🜨, M ♁ or M E, where 🜨 and ♁ are the astronomical symbols for Earth), is a unit of mass equal to the mass of the planet Earth. The current best estimate for the mass of Earth is M 🜨 = 5.9722 × 10 24 kg, with a relative uncertainty of 10 −4. [2] It is equivalent to an average density of 5515 kg/m 3.
Getty Images. Pangaea, the supercontinent that existed about 200 million years ago and combined most of dry land on Earth into one giant landmass (according to the BBC), is well known.
An image of Afro-Eurasia, the largest landmass on Earth. A landmass, or land mass, is a large region or area of land that is in one piece and not noticeably broken up by oceans. [1] [2] The term is often used to refer to lands surrounded by an ocean or sea, such as a continent or a large island.
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A comparison of the two images with Image:Whole world - land and oceans 12000.jpg on the left and Image:Whole world - land and oceans.jpg on the right Licensing Public domain Public domain false false
Most of Earth's land hosts vegetation, [110] but considerable amounts of land are ice sheets (10%, [111] not including the equally large area of land under permafrost) [112] or deserts (33%). [113] The pedosphere is the outermost layer of Earth's land surface and is composed of soil and subject to soil formation processes. Soil is crucial for ...
The Earth seen from Apollo 17.jpg FullMoon2010.jpg Io_highest_resolution_true_color.jpg: Author: Apollo 17 Picture of the Whole Earth: NASA. Telescopic Image of the Full Moon: Gregory H. Revera True color image of Io: NASA / JPL / University of Arizona