Úránù ni planeti keje si Orun. Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named OED Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named BBCOUP Yeomans, Donald K. (July 13, 2006). "HORIZONS System". NASA JPL. Retrieved August 8, 2007.  – At the site, go to the "web interface" then select "Ephemeris Type: ELEMENTS", "Target Body: Uranus Barycenter" and "Center: Sun". Seligman, Courtney. "Rotation Period and Day Length". Retrieved August 13, 2009.  Williams, Dr. David R. (January 31, 2005). "Uranus Fact Sheet". NASA. Retrieved August 10, 2007.  "The MeanPlane (Invariable plane) of the Solar System passing through the barycenter". April 3, 2009. Archived from the original on April 20, 2009. Retrieved April 10, 2009.  (produced with Solex 10 written by Aldo Vitagliano; see also Invariable plane) Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named Seidelmann2007 Munsell, Kirk (May 14, 2007).