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

That day the Sun stood in Aquarius, while the horoscope says "Pisces". The gap is 23.0° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♂–♃ 61.6° ♄︎3° ♂︎16° ☽︎24° ♃︎14° ☿︎20° ☉︎2° ♀︎6°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 332.2° · sign Pisces · constellation Aquarius
  • ☽︎ Moon — 234.7° · sign Scorpio · constellation Libra
  • ☿︎ Mercury — 320.4° · sign Aquarius · constellation Capricornus
  • ♀︎ Venus — 336.4° · sign Pisces · constellation Aquarius
  • ♂︎ Mars — 16.3° · sign Aries · constellation Pisces
  • ♃︎ Jupiter — 314.7° · sign Aquarius · constellation Capricornus
  • ♄︎ Saturn — 3.6° · sign Aries · constellation Pisces
  • ☽︎ Moon 57% 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, 57% lit; the Moon was 400,556 km away.

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

    88.6 orbits of the Sun — 83,280 million km, that is 108,325 return trips to the Moon; 32,367 rotations of Earth; with the Sun — 643.2 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 299 million km away; today it is 245 million km (closer by 1.2×).

    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 June 3, 2028; Jupiter — in 2033; a full moon exactly on this date — February 20, 2027

    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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