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The sky on March 21, 2002 — as it really was

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

РЫБЫОВЕНТЕЛЕЦБЛИЗНЕЦЫРАКЛЕВДЕВАВЕСЫСКОРПИОНЗМЕЕНОСЕЦСТРЕЛЕЦКОЗЕРОГВОДОЛЕЙ ♈︎♉︎♊︎♋︎♌︎♍︎♎︎♏︎♐︎♑︎♒︎♓︎ ♂–☿ 58.6° ☉︎0° ♀︎16° ♂︎13° ♄︎9° ☽︎23° ♃︎6° ☿︎15°

Bodies on the ecliptic (noon UTC)

  • ☉︎ Sun — 0.7° · sign Aries · constellation Pisces
  • ☽︎ Moon — 83.5° · sign Gemini · constellation Taurus
  • ☿︎ Mercury — 345.4° · sign Pisces · constellation Aquarius
  • ♀︎ Venus — 16.7° · sign Aries · constellation Pisces
  • ♂︎ Mars — 44.0° · sign Taurus · constellation Aries
  • ♃︎ Jupiter — 96.3° · sign Cancer · constellation Gemini
  • ♄︎ Saturn — 69.6° · sign Gemini · constellation Taurus
  • ☽︎ Moon 44% 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]

    first quarter, 44% lit; the Moon was 386,644 km away.

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

    24.5 orbits of the Sun — 23,062 million km, that is 29,997 return trips to the Moon; 8,963 rotations of Earth; with the Sun — 178.1 billion km around the Galactic centre, 6.9 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 312 million km away; today it is 246 million km (closer by 1.3×).

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

    That day fell in solar cycle 23, near maximum (46% through the cycle).

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

    Mars returns to that day’s point of its orbit on July 20, 2028; Jupiter — in 2038; a full moon exactly on this date — March 21, 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 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/ap020321.html

    NASA APOD

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