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Wednesday, April 11, 2018
NASA Begins Building Next Mars Rover for 2020 Launch | 'Hole' in the Sun Spawns Powerful Solar Wind | Saturn Moon Dione Toes the Line in Stunning NASA Photo
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angular momentum the measure of the motion of a rotating object in terms of its speed and how widely the object’s mass is distributed arou...
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Gravity is a “built-in” property of mass. Whenever there are masses in the universe, they will interact via the force of gravitational attra...
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Kepler initially assumed that the orbits of planets were circles, but doing so did not allow him to find orbits that were consistent with Br...
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