Before beginning this blog, the main Earth function was not geocentric based. Instead it was just an earth-moon based model. While still including the Earth-Moon model, in light of changing it to geocentric I decided to make a geocentric view of planets moving with respect to a stationary Earth over the course of a year.
The function finds the relative radii of each planet and the sun with respect to the earth, then plots them. It then normalizes the radii and plots again, with all the plants being shown at where they are in the nights sky. To avoid confusion, the planets/lines are color coded. It may be a little difficult to make out the planets in the first figure because of the large scale (~40 AU), the second only takes the first 4 planets so it is much easier to view (~2 AU). Keep in mind that, while it may seem relatively 2 dimensional, there is differences in the z-axis radii (This can best be seen in the center plot on the first figure. On the left of Earth there is a small dot detached from the "rings", this is the track of Pluto.)
Left: Actual relative radii from the earth of all 9 planets and the sun.
Center*: Location of view from the Earth.
Right: Color assignments
Left: Actual radii
Center: Location from Earth
Right: Color assignments
*this model does not take the earth's tilt in its axis (~23 degrees) into account, planets do not necessarily appear on the equatorial plane.
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