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  2. Atmosphere of the Moon - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_the_Moon

    Atmosphere of the Moon. The thin lunar atmosphere is visible on the Moon's surface at sunrise and sunset with the lunar horizon glow [1] and lunar twilight rays, like Earth's crepuscular rays. This Apollo 17 sketch depicts the glow and rays [2] among the general zodiacal light [3][4]. The atmosphere of the Moon is a very sparse layer of gases ...

  3. Atmospheric model - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_model

    Atmospheric model. In atmospheric science, an atmospheric model is a mathematical model constructed around the full set of primitive, dynamical equations which govern atmospheric motions. It can supplement these equations with parameterizations for turbulent diffusion, radiation, moist processes (clouds and precipitation), heat exchange, soil ...

  4. Atmospheric refraction - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_refraction

    Diagram showing displacement of the Sun 's image at sunrise and sunset. Atmospheric refraction is the deviation of light or other electromagnetic wave from a straight line as it passes through the atmosphere due to the variation in air density as a function of height. [1] This refraction is due to the velocity of light through air decreasing ...

  5. Climate model - Wikipedia

    en.wikipedia.org/wiki/Climate_model

    Climate models are systems of differential equations based on the basic laws of physics, fluid motion, and chemistry. Scientists divide the planet into a 3-dimensional grid and apply the basic equations to those grids. Atmospheric models calculate winds, heat transfer, radiation, relative humidity, and surface hydrology within each grid and ...

  6. Lunar theory - Wikipedia

    en.wikipedia.org/wiki/Lunar_theory

    The draconitic month, i.e. the mean period with which the path of the Moon against the stars deviates first north and then south in ecliptic latitude by comparison with the ecliptic path of the Sun, was indicated by a number of different parameters leading to various estimates, e.g. of 27.212204 days, [13] to compare with a modern value of 27. ...

  7. Lunar distance - Wikipedia

    en.wikipedia.org/wiki/Lunar_distance

    The lunar distance is on average approximately 385,000 km (239,000 mi), or 1.28 light-seconds; this is roughly 30 times Earth's diameter or 9.5 times Earth's circumference. Around 389 lunar distances make up an AU astronomical unit (roughly the distance from Earth to the Sun). Lunar distance is commonly used to express the distance to near ...

  8. Astronomy - Wikipedia

    en.wikipedia.org/wiki/Astronomy

    Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets.

  9. Weather forecasting - Wikipedia

    en.wikipedia.org/wiki/Weather_forecasting

    MOS or model output statistics is a technique used to interpret numerical model output and produce site-specific guidance. This guidance is presented in coded numerical form, and can be obtained for nearly all National Weather Service reporting stations in the United States.

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