The sky on October 21, 1971 — as it really was
That day the Sun stood in Virgo, while the horoscope says "Libra". The gap is 23.5° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 207.4° · sign Libra · constellation Virgo
- ☽︎ Moon — 231.2° · sign Scorpio · constellation Libra
- ☿︎ Mercury — 216.0° · sign Scorpio · constellation Virgo
- ♀︎ Venus — 221.9° · sign Scorpio · constellation Libra
- ♂︎ Mars — 322.2° · sign Aquarius · constellation Capricornus
- ♃︎ Jupiter — 246.7° · sign Sagittarius · constellation Scorpius
- ♄︎ Saturn — 65.6° · sign Gemini · constellation Taurus
- ☽︎ Moon 4% 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]
waxing crescent, 4% lit; the Moon was 403,357 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
55 orbits of the Sun — 51,645 million km, that is 67,176 return trips to the Moon; 20,072 rotations of Earth; with the Sun — 398.9 billion km around the Galactic centre, 15.4 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 97 million km away; today it is 246 million km (farther by 2.5×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 20, 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 March 24, 2028; Jupiter — in 2030; a full moon exactly on this date — October 21, 2059
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,736″ since that day; the real constellations now sit 23.5° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.