The sky on June 21, 1979 — 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 — 89.5° · sign Gemini · constellation Taurus
- ☽︎ Moon — 53.8° · sign Taurus · constellation Taurus
- ☿︎ Mercury — 111.7° · sign Cancer · constellation Gemini
- ♀︎ Venus — 71.9° · sign Gemini · constellation Taurus
- ♂︎ Mars — 56.7° · sign Taurus · constellation Taurus
- ♃︎ Jupiter — 128.9° · sign Leo · constellation Cancer
- ♄︎ Saturn — 158.6° · sign Virgo · constellation Leo
- ☽︎ Moon 10% 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, 10% lit; the Moon was 384,945 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
47.3 orbits of the Sun — 44,441 million km, that is 57,805 return trips to the Moon; 17,272 rotations of Earth; with the Sun — 343.2 billion km around the Galactic centre, 13.3 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 327 million km away; today it is 246 million km (closer by 1.3×).
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 (31% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on May 15, 2028; Jupiter — in 2026; a full moon exactly on this date — June 20, 2035
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,376″ 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.