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Earth's location in the Universe. Universe – all of time and space and its contents.. Observable universe – spherical region of the Universe comprising all matter that may be observed from Earth at the present time, because light and other signals from these objects have had time to reach Earth since the beginning of the cosmological expansion.
A variety of symbols or iconographic conventions are used to represent Earth, whether in the sense of planet Earth, or the inhabited world, or as a classical element.A circle representing the round world, with the rivers of Garden of Eden separating the four corners of the world, or rotated 45° to suggest the four continents, remains a common pictographic convention to express the notion of ...
Earth is rounded into an ellipsoid with a circumference of about 40,000 km. It is the densest planet in the Solar System. Of the four rocky planets, it is the largest and most massive. Earth is about eight light-minutes away from the Sun and orbits it, taking a year (about 365.25 days) to complete one revolution.
First movie of Earth from space made without a human camera operator (contrast to Titov's 1961 movie) [35] April 24, 1967 [36] Surveyor 3: First images and view of a sunset and sunrise over Earth at the same time, a solar eclipse by Earth (a celestial body other than the Moon), from the Moon's surface. [37] [38] April 30, 1967
The Day the Earth Smiled is a composite photograph taken by the NASA spacecraft Cassini on July 19, 2013. During an eclipse of the Sun , the spacecraft turned to image Saturn and most of its visible ring system , as well as Earth and the Moon as distant pale dots.
A Proposal for an International Flag of Planet Earth as it was designed by Oskar Pernefeldt, from the Beckmans College of Design in Stockholm, Sweden. [1] [2] Date
Since its conception in 1994 by Judith Donath, [2] [3] the technology behind the E-card has changed significantly. One technical aspect that remained mostly constant until 2019 was the delivery mechanism: the e-mail received by the recipient contains not the E-card itself, but an individually coded link back to the publisher's website that displays the sender's card.
On Earth Day (22 April) 2023, a collection of images to date of Earth taken from various deep space distances in the Solar System was published. [ 35 ] Since the 1960s, Earth has also been described as a massive " Spaceship Earth ," with a life support system that requires maintenance, [ 36 ] or, in the Gaia hypothesis , as having a biosphere ...
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