What is escape velocity? Detailed answer

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What is escape velocity? Detailed answer

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What is second space velocity?

The minimum speed that needs to be reported to a physical body (for example, a spacecraft) so that it can overcome the gravitational attraction of a celestial object (for example, a planet or a star) and leave the sphere of its gravitational action forever is called parabolic speed (a body with such a speed moves along parabolic trajectory).

The parabolic speed decreases with increasing distance from the celestial object. The parabolic speed at the surface of a celestial object is called the second space velocity.

For the Earth, the second cosmic velocity is 11,18 kilometers per second. Parabolic speed at an altitude of 300 kilometers above the Earth's surface (sea level) is 10,93 kilometers per second, at an altitude of 1000 kilometers - 6,98 kilometers per second.

For the Sun, the second cosmic velocity is 617,7 kilometers per second, and the parabolic velocity at a distance of 1 astronomical unit from our luminary (the average radius of the earth's orbit) is 42,1 kilometers per second. For the largest planet in the solar system (Jupiter), the second space velocity is 59,5 kilometers per second, for the smallest (Mercury) - 4,2 kilometers per second.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

Where does water boil faster?

The Celsius scale is based on 2 points: 0° is the freezing point of water, 100° is the boiling point. However, all this is true for conditions at sea level, at a standard atmospheric pressure of 760 mm Hg. Art. The lower this pressure, the lower the boiling point of water. In the high-mountain capitals of Lhasa (Tibet) and La Paz (Bolivia), at an altitude of 4000 m above sea level, water boils already at a temperature of 87 ° C, and on the shores of the Dead Sea (343 m below sea level) - at 101 ° C.

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