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Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is enabled by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its global ocean, covering 70.8% of Earth's crust.
- History
Earth's history with time-spans of the eons to scale. The...
- Internal structure
Geological cross section of Earth, showing the different...
- Earth science
Earth science or geoscience includes all fields of natural...
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The geological history of the Earth follows the major...
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- Orbit and Turning
- History of Earth
- Geology of Earth
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Earth is one of the eight planets in the Solar System. There are also thousands of small bodies which move around the Sun. The Solar System is moving through the Orion Arm of the Milky Way galaxy, and will be for about the next 10,000 years. Earth is about 150,000,000 kilometres or 93,000,000 miles away from the Sun (this distance is called an "ast...
Earth and the other planets formed about 4.6 billion years ago. Their origin was different from that of the Sun. The Sun was formed almost entirely of hydrogen, while the planets were formed mostly from higher elements. The smaller "rocky" planets are made almost entirely of higher elements. The Sun must have moved through areas where supernovae ha...
Earth is rocky. It is the largest of the rocky planets moving around the Sun by mass and by size. It is much smaller than the gas giants such as Jupiter.
About eight billion people live on Earth. They live in about 200 different lands called countries. Some, for example, Russia, are large with many large cities. Others, for example, Vatican City, are small. The seven countries with the most people are India, China, the United States, Indonesia, Pakistan, Brazil and Nigeria. About 90% of people live ...
There is wide agreement that the long-term future of Earth is tied to the future of the Sun.As time passes, the Sun will get hotter, and that will eventually make the Earth a planet without life.
"Earth – Science questions". NASA. Archived from the original on 10 March 2005. Retrieved 10 October 2004."Earth – Speed through space – about 1 million miles an hour" (PDF). NASA. ("WP discussion")Earth's history with time-spans of the eons to scale. The history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to understanding of the main events of Earth's past, characterized by constant geological change and biological evolution.
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2 days ago · Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbor life. Learn more about development and composition of Earth in this article.
- Earth is the third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its near-surface environments ar...
- Earth is located in the Orion-Cygnus Arm, one of the four spiral arms of the Milky Way, which lies about two-thirds of the way from the centre of t...
- Earth’s name in English, the international language of astronomy, derives from Old English and Germanic words for ground and earth, and it is the o...
- Earth and the other planets in the solar system formed about 4.6 billion years ago. The early Earth had no ozone layer and no free oxygen, lacked o...
- Viewed from another planet, Earth would appear bright and bluish in colour. In latitudinal belts, swirling white cloud patterns of midlatitude and...
Geological cross section of Earth, showing the different layers of the interior. The internal structure of Earth is the layers of the Earth, excluding its atmosphere and hydrosphere.
Earth science or geoscience includes all fields of natural science related to the planet Earth. This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).
The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy).
