The astronomical explanation for Mercury retrograde

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  • čas přidán 11. 07. 2020
  • An astronomical explanation for Mercury's retrograde motion: the inner planet appears to retrace its steps a few times per year. Every planet does this, every year. In fact, there is a planet in retrograde for 75% of 2020
    Imagery from: NASA / Hubble / Cassini / JHUAPL / SwRI / Solar System Scope processing www.solarsystemscope.com/text... under CC BY 4.0
    NASA ephemeris data: ssd.jpl.nasa.gov/horizons.cgi...
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