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The sky on March 13, 1936 — as it really was

That day the Sun stood in Pisces — sign and constellation agree here.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–☉ 122.4°♃–♀ 61.7°♃–☉ 89.5° ♂︎15° ☽︎20° ♃︎23° ♀︎24° ☿︎0° ♄︎14° ☉︎22°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 352.7° · sign Pisces · constellation Pisces
  • ☽︎ Moon — 230.4° · sign Scorpio · constellation Libra
  • ☿︎ Mercury — 330.3° · sign Pisces · constellation Aquarius
  • ♀︎ Venus — 324.9° · sign Aquarius · constellation Capricornus
  • ♂︎ Mars — 15.5° · sign Aries · constellation Pisces
  • ♃︎ Jupiter — 263.2° · sign Sagittarius · constellation Ophiuchus
  • ♄︎ Saturn — 344.0° · sign Pisces · constellation Aquarius
  • ☽︎ Moon 77% illuminated

astronomy-engine ephemerides (VSOP87/ELP), IAU 1930 constellation boundaries. Positions accurate to a fraction of a degree.

The day’s dossier, from real data

Checkable facts with a tag and a source; the classical reading is in the chart.

  1. The Moon that day [EXACT]

    waning gibbous, 77% lit; the Moon was 401,610 km away.

    astronomy-engine
  2. How far Earth has travelled since [EXACT]

    90.6 orbits of the Sun — 85,108 million km, that is 110,702 return trips to the Moon; 33,077 rotations of Earth; with the Sun — 657.3 billion km around the Galactic centre, 25.4 light-days.

    29.78 km/s along the orbit; 230 km/s around the Galactic centre
  3. Mars then and now [EXACT]

    On that day Mars was 344 million km away; today it is 245 million km (closer by 1.4×).

    astronomy-engine; checked against JPL Horizons for 2026-09-14
  4. When the sky repeats [EXACT]

    Mars returns to that day’s point of its orbit on May 11, 2028; Jupiter — in 2031; a full moon exactly on this date — March 13, 2055

    sidereal periods: Mars 686.98 d, Jupiter 11.862 yr
  5. How far the sky has drifted since [EXACT]

    The vernal point has shifted 4,536″ since that day; the real constellations now sit 23° away from the astrologers’ “signs”.

    precession 50.29″/yr

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