Volume 15 Issue 4April 2009
Heliocentric Coordinates For The Visible Planets -- A View From Above
Name Apr 05 Apr 15 Apr 25
Mercury 154o 36' 098o 51' 154o 36'
Venus 200o 29' 216o 33 232o 33'
Earth 195o 20' 205o 09' 214o 55'
Mars 325o 47' 332o 07' 338o 28'
Jupiter 310o 30' 311o 22' 312o 14'
Saturn 169o 18' 169o 39' 170o 00'
Plot planet positions using polar graph paper or the provided activity sheet.

This is a coordinate system which allows for the plotting of a planet position along its orbital path using degrees (0o to 360o) of heliocentric longitude. Once plotted the orbital position of one planet could be compared with that of another planet. Or the relative orbital speeds of an inner planet could be compared with that of an outer planet.

Terrestrial Planets in Motion at 5 day intervals — April 2009
Above the Terrestrial Planets - April 2009
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