Friday, August 25, 2017

The Moon's Motion in 2017


  Here's a 3D plot of the Moon's orbit for 2017. I tried to lighten the red a little to reduce the residual red traces. The apparently vertical sides are due to the stretched vertical axis. The plane of the Moon orbit appears to be rotating about the to & fro axis. It's easiest to view in three dimensions if you track the black lines that you see with red/cyan 3D glasses on. Move towards and away from the screen to find the best viewing distance.


Here's the same with the axes and gridlines removed.


The small dots are daily noon positions and the large dot is the last position, New Year's Day 2018. The the horizontal axis was reduced slightly to increase the right margin.

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