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The sky on May 21, 1938 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☉–♃ 89.0°♂–☽ 120.7° ♄︎14° ☿︎4° ☉︎29° ♂︎18° ♀︎26° ☽︎18° ♃︎0°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 59.8° · sign Taurus · constellation Taurus
  • ☽︎ Moon — 318.2° · sign Aquarius · constellation Aquarius
  • ☿︎ Mercury — 34.5° · sign Taurus · constellation Cetus
  • ♀︎ Venus — 86.2° · sign Gemini · constellation Taurus
  • ♂︎ Mars — 78.9° · sign Gemini · constellation Taurus
  • ♃︎ Jupiter — 330.7° · sign Pisces · constellation Aquarius
  • ♄︎ Saturn — 14.2° · sign Aries · constellation Pisces
  • ☽︎ Moon 60% 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]

    last quarter, 60% lit; the Moon was 400,107 km away.

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

    88.4 orbits of the Sun — 83,051 million km, that is 108,027 return trips to the Moon; 32,278 rotations of Earth; with the Sun — 641.4 billion km around the Galactic centre, 24.8 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 373 million km away; today it is 246 million km (closer by 1.5×).

    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 October 14, 2026; Jupiter — in 2033.

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

    The vernal point has shifted 4,428″ since that day; the real constellations now sit 23° away from the astrologers’ “signs”.

    precession 50.29″/yr

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