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Space velocities

by Lewis Carroll
written by Lewis Carroll

Space velocities  are the minimum speeds at which a body can become a satellite of a massive object (first cosmic velocity), overcome the gravitational attraction of this object and move away from it “to infinity” (second cosmic velocity, or escape velocity) or (for the Solar System) overcome gravity of the Sun and leave the solar system (third cosmic speed). In the region of the Earth’s surface, the second escape velocity is 11.2 km/s. At the surface of the Sun it is 620 km/s, and in the galaxy (in the region of the Sun’s orbit) it is about 400 km/s.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

Lewis Carroll writes about military space programmes, policy, technology and the industry that supports the sector. He spent nearly two decades covering the military, the Pentagon, Congress and the defence industry as a journalist for Space Chatter magazine.

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