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The sky on December 8, 2004 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♄–☽ 91.9°♃–☉ 62.3° ♄︎26° ♃︎14° ☽︎28° ♂︎18° ♀︎19° ☉︎16° ☿︎21°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 256.7° · sign Sagittarius · constellation Ophiuchus
  • ☽︎ Moon — 208.4° · sign Libra · constellation Virgo
  • ☿︎ Mercury — 261.1° · sign Sagittarius · constellation Ophiuchus
  • ♀︎ Venus — 229.8° · sign Scorpio · constellation Libra
  • ♂︎ Mars — 228.3° · sign Scorpio · constellation Libra
  • ♃︎ Jupiter — 194.4° · sign Libra · constellation Virgo
  • ♄︎ Saturn — 116.5° · sign Cancer · constellation Gemini
  • ☽︎ Moon 17% 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 crescent, 17% lit; the Moon was 374,106 km away.

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

    21.8 orbits of the Sun — 20,508 million km, that is 26,675 return trips to the Moon; 7,970 rotations of Earth; with the Sun — 158.4 billion km around the Galactic centre, 6.1 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 358 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, on the decline (68% through the cycle).

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

    Mars returns to that day’s point of its orbit on July 5, 2027; Jupiter — in 2028; a full moon exactly on this date — December 7, 2041

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

    The vernal point has shifted 1,080″ 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/ap041208.html

    NASA APOD

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