The sky on March 21, 2004 — as it really was
That day the Sun stood in Pisces, while the horoscope says "Aries". The gap is 23.9° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 1.2° · sign Aries · constellation Pisces
- ☽︎ Moon — 7.8° · sign Aries · constellation Cetus
- ☿︎ Mercury — 17.0° · sign Aries · constellation Pisces
- ♀︎ Venus — 47.0° · sign Taurus · constellation Aries
- ♂︎ Mars — 60.1° · sign Gemini · constellation Taurus
- ♃︎ Jupiter — 161.8° · sign Virgo · constellation Leo
- ♄︎ Saturn — 96.5° · sign Cancer · constellation Gemini
- ☽︎ 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.
- The Moon that day [EXACT]
new moon, 0% lit; the Moon was 389,508 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
22.5 orbits of the Sun — 21,181 million km, that is 27,550 return trips to the Moon; 8,232 rotations of Earth; with the Sun — 163.6 billion km around the Galactic centre, 6.3 light-days.
29.78 km/s along the orbit; 230 km/s around the Galactic centre - Mars then and now [EXACT]
On that day Mars was 275 million km away; today it is 246 million km (closer by 1.1×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 23, on the decline (62% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on October 16, 2026; Jupiter — in 2028; a full moon exactly on this date — March 21, 2038
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 1,116″ since that day; the real constellations now sit 23.9° away from the astrologers’ “signs”.
precession 50.29″/yr - Picture of the day [EXACT]
NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap040321.html
NASA APOD
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