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The sky on June 21, 1944 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☿–♂ 59.4° ☿︎18° ♀︎28° ☉︎29° ♄︎0° ☽︎9° ♂︎17° ♃︎23°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 90.0° · sign Gemini · constellation Gemini
  • ☽︎ Moon — 99.4° · sign Cancer · constellation Gemini
  • ☿︎ Mercury — 78.1° · sign Gemini · constellation Taurus
  • ♀︎ Venus — 88.4° · sign Gemini · constellation Taurus
  • ♂︎ Mars — 137.5° · sign Leo · constellation Leo
  • ♃︎ Jupiter — 143.5° · sign Leo · constellation Leo
  • ♄︎ Saturn — 90.2° · sign Cancer · constellation Gemini
  • ☽︎ Moon 1% 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]

    new moon, 1% lit; the Moon was 390,608 km away.

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

    82.3 orbits of the Sun — 77,331 million km, that is 100,587 return trips to the Moon; 30,055 rotations of Earth; with the Sun — 597.3 billion km around the Galactic centre, 23.1 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 325 million km away; today it is 245 million km (closer by 1.3×).

    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 March 25, 2027; Jupiter — in 2027; a full moon exactly on this date — June 20, 2035

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

    The vernal point has shifted 4,140″ since that day; the real constellations now sit 23.1° away from the astrologers’ “signs”.

    precession 50.29″/yr

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