Answer:
<u>Geocentric Model</u>: - this model is Earth Centered
-Retrograde motion is explained by epicycles
<u>Heliocentric Model</u>: - This model is Sun Centered
-Retrograde motion is explained by the orbital speeds of planets
<u>Both models</u>:- Epicycles and deferents help explain planetary motion
-Planets move in circular orbits and with uniform motion
-The brightness of a planet increases when the planet is closest to Earth
Explanation:
Retrograde motion is an apparent change in the movement of the planet through the sky. Ptolemy's model of the solar systems was geocentric, where the Sun, Moon, planets and start all orbit the Earth in perfectly circular orbits. However this perfectly circular orbits around the Earth did not explain the occasional retrograde motion of the planets. In the Copernicus' heliocentric model, retrograde motion of planets is naturally explained. The explanation for retrograde motion in a heliocentric model is that retrograde occurs roughly when a faster moving planet catches up to and passes a slower moving planet.
A triangle with a base length of 4 in. and a height of 8 in.
A triangle with a base length of 2 in. and a height of 16 in.
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Mount Everest - 700,00 feet high
Winter is the phase of year when countries in the northern and southern hemispheres, respectively, see the least amount of direct sunlight.
December, January, and February in the Northern Hemisphere and June, July, and August in the Southern Hemisphere are the months when a portion of the Earth experiences the least amount of daylight. The Earth's 23.5° axial tilt as it orbits the sun causes solitons and varying solar declinations. This indicates that, during the year, one of the hemispheres is tilted toward the sun and receives the most intense solar rays, while the other receives the least amount of sunlight.
To know more about axial tilt
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