Ocean trench,volcanoes and fold mountains are created
hope it helps c:
Most of the money in Afghanistan is not suprisingly used to purchase weapons, amoury and military confinements. This obviously doesn't come cheap. So in thought that war would get them rich, making civilians happier with life in Afghan, everything went wrong and they had a downfall. There is not a single battle going on meaning weapons cannot be used. Meaning it was a waste of money. They then sold few amounts of guns, armoury and soldiers to the U.S and got not much money. This is why they are what they are today.
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.
Is this a question or a fact
