This draws the path traced out by a point on the edge of a circle. That circle rotates around a point on the rim of another circle, and so on, several times. These were the basis for the pre-heliocentric model of planetary motion. http: / /en. wikipedia. org/ wiki/ Deferent_and_epicycle Written by James Youngman; 1998.
Þetta forrit teiknar slóð, lagða út af punkti á brún hrings. Sá hringur snýst um punkt á kanti annars hrings og þannig áfram nokkur skipti. Þetta lá til grundvallar for- hringmiðju líkaninu fyrir hreifingu himintunglana. Skrifað af James Youngman.