Was the Geocentric Model correct at all? - Astronomy Stack Exchange
Sep 16, 2020 · Edit 1: I incorrectly used geocentric model when it seems I wanted to say Ptolemaic model - the one with deferents and epicycles, with Earth as its origin. Ptolemaic model (click for full …
history - How did Geocentric Models (Aristotle, Ptolemy) explain the ...
Apr 22, 2025 · How did Geocentric Models (Aristotle, Ptolemy) explain the conjunctions of the inner planets? Ask Question Asked 7 months ago Modified 1 month ago
How do the phases of Venus prove heliocentrism?
May 23, 2023 · The key point is that Venus always goes in a tiny little circle in front of the Sun, in the geocentric model. This was a necessity as they always saw that Venus was close to the Sun, in the …
the sun - Did we ever actually see the earth revolving around the sun ...
In a geocentric model, the size changes could be explained by an elliptic orbit of Venus around Earth, but the phase changes synchronized with that are harder to explain. Both phenomena become trivial …
Why would there be a correction for the orbit of the moon in the ...
Apr 29, 2023 · For various reasons, Ptolemy desired to use an epicyclic model. This model allowed him the flexibility to describe a wide range of motions. Ptolemy had inherited a model of the moon's …
What were the estimated distances of planets from the Earth in the ...
Nov 19, 2024 · The geocentric model was used before the 16th century, and was standardized by Ptolemy in the 2nd century. What were the estimated distances of each planet from the Earth, and …
How did Copernicus get the idea of heliocentric model?
Apr 14, 2014 · The heliocentric model marked the beginning of modern astronomy. But what were the reasons which led Copernicus to think that the earth orbited the sun. I've read that his model was …
Nicolas Copernicus discovery - Astronomy Stack Exchange
Jan 30, 2021 · In geocentric system you can expand or shrink orbit of a given planet without affecting others. This is impossible in Copernicus system - it essence, he created 3D model of the solar system.
In geocentric models, did the Earth rotate? - Astronomy Stack Exchange
Feb 1, 2015 · In the historic geocentric models, and in particular in the Ptolemaic model, the earth is immobile in the centre of the cosmos, and the sphere of the fixed stars rotates around it once a day, …
geocentrism - software library that calculates earth/moon/sun/planets ...
Sep 28, 2022 · is there any software library that calculates earth/moon/sun/planets positions based on the geocentric model? if that exists, why is the heliocentric model the most popular?