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The sky on May 31, 2002 — as it really was

That day the Sun stood in Taurus, while the horoscope says "Gemini". The gap is 23.9° of precession.

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ☉–☽ 118.1° ☿︎3° ☉︎9° ♄︎17° ♂︎1° ♀︎13° ♃︎16° ☽︎11°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 69.9° · sign Gemini · constellation Taurus
  • ☽︎ Moon — 311.8° · sign Aquarius · constellation Capricornus
  • ☿︎ Mercury — 63.6° · sign Gemini · constellation Taurus
  • ♀︎ Venus — 103.1° · sign Cancer · constellation Gemini
  • ♂︎ Mars — 92.0° · sign Cancer · constellation Gemini
  • ♃︎ Jupiter — 106.5° · sign Cancer · constellation Gemini
  • ♄︎ Saturn — 77.3° · sign Gemini · constellation Taurus
  • ☽︎ Moon 74% 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, 74% lit; the Moon was 394,567 km away.

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

    24.3 orbits of the Sun — 22,880 million km, that is 29,760 return trips to the Moon; 8,892 rotations of Earth; with the Sun — 176.7 billion km around the Galactic centre, 6.8 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 374 million km away; today it is 245 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 23, near maximum (47% through the cycle).

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

    Mars returns to that day’s point of its orbit on November 12, 2026; Jupiter — in 2038; a full moon exactly on this date — May 30, 2045

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

    The vernal point has shifted 1,224″ since that day; the real constellations now sit 23.9° away from the astrologers’ “signs”.

    precession 50.29″/yr
  7. Picture of the day [EXACT]

    NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap020531.html

    NASA APOD

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