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Updated: May 8, 2026

Measurement of Aerosols Optical Thickness of the Atmosphere using the GLOBE Handheld Sun Photometer
06:27

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Published on: May 29, 2019

土星の中間大気圏における赤道振動

T Fouchet1, S Guerlet, D F Strobel

  • 1LESIA, Observatoire de Paris, Université Pierre et Marie Curie, CNRS, Paris 7, Meudon F-92195, France. thierry.fouchet@obspm.fr

Nature
|May 10, 2008
PubMed
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土星 サターン

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Circular Orbits and Critical Velocity for Satellites

The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
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Variation of Atmospheric Pressure

Change in atmospheric pressure with height is particularly interesting. The decrease in atmospheric pressure with increasing altitude is due to the decreasing gravitational force per unit area as we move away from the surface of the earth.
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