The sky on July 18, 1971 — as it really was
That day the Sun stood in Gemini, while the horoscope says "Cancer". The gap is 23.5° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 115.2° · sign Cancer · constellation Gemini
- ☽︎ Moon — 67.6° · sign Gemini · constellation Taurus
- ☿︎ Mercury — 139.7° · sign Leo · constellation Leo
- ♀︎ Venus — 104.2° · sign Cancer · constellation Gemini
- ♂︎ Mars — 321.6° · sign Aquarius · constellation Capricornus
- ♃︎ Jupiter — 236.7° · sign Scorpio · constellation Libra
- ♄︎ Saturn — 63.3° · sign Gemini · constellation Taurus
- ☽︎ 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.
- The Moon that day [EXACT]
waning crescent, 17% lit; the Moon was 377,857 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
55.2 orbits of the Sun — 51,892 million km, that is 67,497 return trips to the Moon; 20,168 rotations of Earth; with the Sun — 400.8 billion km around the Galactic centre, 15.5 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 62 million km away; today it is 245 million km (farther by 3.9×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 20, near maximum (60% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on December 20, 2027; Jupiter — in 2030; a full moon exactly on this date — July 18, 2046
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,772″ 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.