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The sky on August 15, 1976 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☽–☉ 117.2° ☽︎25° ♃︎29° ♄︎8° ☉︎22° ♀︎8° ☿︎17° ♂︎24°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 142.8° · sign Leo · constellation Leo
  • ☽︎ Moon — 25.5° · sign Aries · constellation Pisces
  • ☿︎ Mercury — 167.8° · sign Virgo · constellation Leo
  • ♀︎ Venus — 158.8° · sign Virgo · constellation Leo
  • ♂︎ Mars — 174.4° · sign Virgo · constellation Virgo
  • ♃︎ Jupiter — 59.2° · sign Taurus · constellation Taurus
  • ♄︎ Saturn — 128.7° · sign Leo · constellation Cancer
  • ☽︎ Moon 73% 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, 73% lit; the Moon was 404,063 km away.

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

    50.1 orbits of the Sun — 47,121 million km, that is 61,291 return trips to the Moon; 18,314 rotations of Earth; with the Sun — 363.9 billion km around the Galactic centre, 14.1 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 359 million km away; today it is 244 million km (closer by 1.5×).

    astronomy-engine; checked against JPL Horizons for 2026-09-14
  4. Solar cycle [ESTIMATE]

    That day fell in solar cycle 21, right at the minimum (4% through the cycle).

    SILSO smoothed minima
  5. When the sky repeats [EXACT]

    Mars returns to that day’s point of its orbit on May 28, 2027; Jupiter — in 2035; a full moon exactly on this date — August 14, 2038

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

    The vernal point has shifted 2,520″ since that day; the real constellations now sit 23.5° away from the astrologers’ “signs”.

    precession 50.29″/yr

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