Title, I tried converting the coordinates from here to rectangular but it seems off.

  • $\begingroup$ JPL Horizons. $\endgroup$ – Mark Adler Apr 29 '17 at 23:56
  • $\begingroup$ err...could you tell me how? lol $\endgroup$ – display name Apr 29 '17 at 23:59
  • $\begingroup$ Explore and learn. $\endgroup$ – Mark Adler Apr 30 '17 at 0:00
  • $\begingroup$ I only see Heliocentric coordinates, no options for rectangular formats $\endgroup$ – display name Apr 30 '17 at 0:42
  • $\begingroup$ Give us an example of the coordinates you used and the answer you came up with. $\endgroup$ – Organic Marble Apr 30 '17 at 1:44

At the bottom of your linked web page is the sentence:

If you need really accurate data for a planet or asteroid, try the JPL HORIZONS System. (These guys were navigating spacecraft through the solar system when I was still playing with GI Joe!)

...which is indeed an excellent answer to your question!

A step-by-step example of how to obtain "rectangular coordinates of the solar system planets" using Horizons can be found in this answer.

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I could not find a good live imagery of planetary positions. Also try this question in Astronomy SE.

http://www.astrosoftware.com/cpnew/software/sirius/features/skymap.html works well.

The examples in the question and the comments are valid ways to track the planets. I do see plausibility in converting the coordinates into a visual grid.

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