The sky on May 31, 1978 — as it really was
That day the Sun stood in Taurus, while the horoscope says "Gemini". The gap is 23.6° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 69.7° · sign Gemini · constellation Taurus
- ☽︎ Moon — 8.8° · sign Aries · constellation Pisces
- ☿︎ Mercury — 53.9° · sign Taurus · constellation Taurus
- ♀︎ Venus — 101.3° · sign Cancer · constellation Gemini
- ♂︎ Mars — 142.7° · sign Leo · constellation Leo
- ♃︎ Jupiter — 99.0° · sign Cancer · constellation Gemini
- ♄︎ Saturn — 144.8° · sign Leo · constellation Leo
- ☽︎ Moon 26% 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, 26% lit; the Moon was 385,912 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
48.3 orbits of the Sun — 45,436 million km, that is 59,100 return trips to the Moon; 17,659 rotations of Earth; with the Sun — 350.9 billion km around the Galactic centre, 13.5 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 244 million km away; today it is 245 million km (farther by 1×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 21, on the rise to maximum (21% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on April 25, 2027; Jupiter — in 2037; a full moon exactly on this date — May 30, 2045
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,412″ since that day; the real constellations now sit 23.6° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.