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Earth is the third planet from the Sun with an approximate distance of 149.6 million kilometres (93.0 million miles), and is traveling nearly 2.1 million kilometres per hour (1.3 million miles per hour) through outer space.
Ignoring the influence of other Solar System bodies, Earth's orbit, also called Earth's revolution, is an ellipse with the Earth–Sun barycenter as one focus with a current eccentricity of 0.0167. Since this value is close to zero, the center of the orbit is relatively close to the center of the Sun (relative to the size of the orbit).
After the Late Heavy Bombardment, Earth's crust had cooled, its water-rich barren surface is marked by continents and volcanoes, with the Moon still orbiting Earth half as far as it is today, appearing 2.8 times larger and producing strong tides. [71] During the Neoproterozoic, 1000 to 539 Ma, much of Earth might have been covered in ice.
Earth's atmosphere photographed from the International Space Station.The orange and green line of airglow is at roughly the altitude of the Kármán line. [1]The Kármán line (or von Kármán line / v ɒ n ˈ k ɑːr m ɑː n /) [2] is a conventional definition of the edge of space.
Earth–Moon L 2 has been used for a communications satellite covering the Moon's far side, for example, Queqiao, launched in 2018, [29] and would be "an ideal location" for a propellant depot as part of the proposed depot-based space transportation architecture. [30] Earth–Moon L 4 and L 5 are the locations for the Kordylewski dust clouds. [31]
Notably, Artemis I represents the first time explorers intended to travel this far out — Apollo 13 only ventured so far from Earth because NASA's emergency flight plan required the Moon as a ...
This is because the distance between Earth and the Sun is not fixed (it varies between 0.983 289 8912 and 1.016 710 3335 au) and, when Earth is closer to the Sun , the Sun's gravitational field is stronger and Earth is moving faster along its orbital path. As the metre is defined in terms of the second and the speed of light is constant for all ...
As Earth's natural satellite, the moon is our planet's closest space neighbor and companion, joining us for the over 365-day journey around the sun.But "close" is a relative term in the expanding ...