Answer:The Arctic Circle is one of the two polar circles and the most northerly of the five major circles of latitude as shown on maps of Eart
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Description The Fermi paradox, named after Italian-American physicist Enrico Fermi, is the apparent contradiction between the lack of evidence for extraterrestrial civilizations and various high estimates for their probability. Michael H. Hart formalized the basic points of the argument in a 1975 paper.
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the December solstice occurs when Earth is near its perihelion , or closest point to the sun , around which time we're moving fastest in orbit .
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The average flow velocity of a river increases along its long profile. This makes sense; along the profile, more potential energy is converted to kinetic energy, increasing the velocity. This is only the average velocity however; a cross-section of a river shows that the velocity varies from one side to the other.
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Stars are formed from massive clouds of dust and gas in space.
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