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With these advantages they acquire a lopsided dominance over the planet's ecosystem. The advent of agriculture around 12,000 years ago, and the scientific revolution which just kicked of some 500 years ago, further accelerate this process, and rapidly propel Homo Sapiens from cave dwelling hunter-gatherers to a planet-spanning civilization.
Earth orbits the Sun, making Earth the third-closest planet to the Sun and part of the inner Solar System. Earth's average orbital distance is about 150 million km (93 million mi), which is the basis for the astronomical unit (AU) and is equal to roughly 8.3 light minutes or 380 times Earth's distance to the Moon.
A planet's year depends on its distance from its star; the farther a planet is from its star, the longer the distance it must travel and the slower its speed, since it is less affected by its star's gravity. No planet's orbit is perfectly circular, and hence the distance of each from the host star varies over the course of its year.
Anarâškielâ; العربية; Արեւմտահայերէն; বাংলা; Беларуская (тарашкевіца) Čeština; Cymraeg; Ελληνικά
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Earth is the only planet in the galaxy known to support life. Earth has many places that are suitable for humans to live in, although some areas of the planet can be very dangerous, too. About 71% of Earth's surface is covered in salt water oceans. Earth is the only place in the Solar System where liquid water is known to exist at present.
Astronaut, Susan Helms, looking out the window on the International Space Station. Windows on Earth is a museum exhibit, website, and exploration tool, developed by TERC, Inc. (an educational non-profit organization, previously called Technical Education Research Centers [1]), and the Association of Space Explorers, that enables the public to explore an interactive, virtual view of Earth from ...
Mission: Earth, Voyage to the Home Planet is a children's literature book by science writer June A. English and astronaut Thomas David Jones that was published in 1996 by Scholastic. Jones was among the crew members of the Space Shuttle Endeavour during an eleven-day mission in space , which was launched in April 1994 to study the ecological ...