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Escape velocity
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In celestial mechanics, escape velocity or escape speed is the minimum speed needed for an object to escape from contact with or orbit of a primary body, assuming:
Luna 1, launched in 1959, was the first artificial object to attain escape velocity from Earth (see also: List of Solar System probes)
Luna 1, launched in 1959, was the first artificial object to attain escape velocity from Earth (see also: List of Solar System probes)
STS115 Atlantis undock ISS edit 2
STS115 Atlantis undock ISS edit 2
Luna 1
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Luna 1, also known as Mechta, E-1 No.4 and First Lunar Rover, was the first spacecraft to reach the vicinity of Earth's Moon, the first spacecraft to leave Earth's orbit, and the first to be placed in
Escape velocity
…divided by the mass. An object has reached escape velocity when the specific orbital energy is greater than or equal to zero. Conservation of energy Luna 1, launched in 1959, was the first artificial object to attain escape velocity from Earth The existence of escape velocity can be thought of as a consequence…
Route of Luna 1 on a Soviet stamp.
Route of Luna 1 on a Soviet stamp.