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The greater the altitude of an Earth satellite, the longer it takes to complete one orbit. Why is it impossible for any vehivle to go aroung Earth in less than 80 minutes?
michalll said:Because the centrifugal force would be greater than gravitational, unless you compensate it some other way. Computing this you get the minimal period something about 84 minutes.
Celestial mechanics is the branch of astronomy that deals with the motion of celestial bodies, such as planets, moons, and stars, under the influence of gravity and other forces.
The Earth takes approximately 365.24 days, or one year, to complete one orbit around the Sun.
This is because the Earth's orbit is determined by its distance from the Sun and the force of gravity between them. If the orbit time were to suddenly change to 80 minutes, it would mean that either the Earth's distance from the Sun or the force of gravity has drastically changed, which is not possible.
Earth's orbit time is primarily affected by its distance from the Sun and the force of gravity between them. Other factors that can have a minor impact include the gravitational pull of other planets and the Earth's axial tilt.
Earth's orbit time is calculated using Kepler's third law of planetary motion, which states that the square of a planet's orbital period is proportional to the cube of its average distance from the Sun. By knowing the Earth's average distance from the Sun (149.6 million kilometers), we can calculate its orbit time of 365.24 days.