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The sky on February 17, 1950 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♄︎17° ♂︎10° ☿︎3° ♀︎3° ♃︎17° ☉︎28° ☽︎4°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 328.3° · sign Aquarius · constellation Aquarius
  • ☽︎ Moon — 334.7° · sign Pisces · constellation Aquarius
  • ☿︎ Mercury — 303.3° · sign Aquarius · constellation Capricornus
  • ♀︎ Venus — 303.3° · sign Aquarius · constellation Capricornus
  • ♂︎ Mars — 190.9° · sign Libra · constellation Virgo
  • ♃︎ Jupiter — 317.7° · sign Aquarius · constellation Capricornus
  • ♄︎ Saturn — 167.4° · sign Virgo · constellation Leo
  • ☽︎ Moon 0% 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, 0% lit; the Moon was 392,696 km away.

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

    76.6 orbits of the Sun — 72,017 million km, that is 93,675 return trips to the Moon; 27,990 rotations of Earth; with the Sun — 556.2 billion km around the Galactic centre, 21.5 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 119 million km away; today it is 244 million km (farther by 2.1×).

    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 31, 2027; 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 3,852″ since that day; the real constellations now sit 23.2° away from the astrologers’ “signs”.

    precession 50.29″/yr

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