Moon phases, lunar cycle, Earth orbit, Moon orbit, heliocentric model, geocentric reference frame, lunar movement, Moon's rotation, Earth's rotation, Sun illumination, Moon's ash light, lunar trajectory, Moon's face, Earth Moon Sun alignment, first crescent, first quarter, last quarter, waning gibbous Moon, new Moon, Moon's orbital period, Earth's orbital period, lunation, Moon's axis rotation, fixed stars reference frame, terrestrial reference frame, prototype, reference model, lunar observation, Moon's trajectory in 24h, Earth's movement, Sun's illumination, lunar light phases, Moon's dark part illumination.
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Abstract
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Abstract
This document explains the Moon's phases, its orbital period around the Earth, and how it rotates on its axis. It discusses the geocentric and heliocentric models, describing the Earth's movement around the Sun.
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[...] According to this model, the Moon's motion is circular and uniform around the Earth. The Earth's revolution period is about 29 days, and as it orbits the Earth, the Moon also rotates on its own axis around its poles in about 27 days. Since the duration of these movements is very close, the Moon always presents the same face to the Earth. The illuminated surface of the Moon by the Sun and visible from Earth does not the same appearance according to the position of the Moon relative to the Earth, this is what we call the 'phases of the Moon'. [...]
[...] The Earth's orbital period around the Sun is approximately 365 days, so 2 days of movement is not significant and not visible on the diagram. The Earth appears to be in the same position. 5°) What is the phase of the Moon illustrated in document 5 above Waning Gibbous Moon 6°) a. Explain why, from Earth, the Moon is not visible when it is in position A in document 1. The face illuminated by the Sun is not the face visible from Earth. b. [...]
[...] What can make a model endure? Or What type of obstacle can oppose the truth of a model? The observations or experiments contradicting the model oppose its truthfulness. Thus, we have evidence that the model is erroneous. A model can endure as long as we do not find evidence refuting it. Give two synonyms for the word 'model' Prototype and reference 2nd part Lunar Movement Define what is called the 'phases of the Moon'. In your definition, indicate which movement is responsible for the different phases of the Moon, or failing to specify in which reference frame you describe it. [...]
[...] The dark part of the Moon is then illuminated by an ash light. 7°) Justify that the Moon only shows us one of its faces, by supporting your answer with a tracking of the successive positions of the drawing in document in a reference system linked to the center of the Moon and with axes directed towards fixed stars. The Moon always shows only one of its faces to the Earth because the Moon's orbital period around the Earth is about 29 days, and while it orbits the Earth, the Moon also rotates on its axis around its poles in about 27 days. [...]
