The sky on September 29, 1977 — as it really was
That day the Sun stood in Virgo, while the horoscope says "Libra". The gap is 23.6° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 186.2° · sign Libra · constellation Virgo
- ☽︎ Moon — 31.4° · sign Taurus · constellation Pisces
- ☿︎ Mercury — 171.6° · sign Virgo · constellation Leo
- ♀︎ Venus — 158.4° · sign Virgo · constellation Leo
- ♂︎ Mars — 106.6° · sign Cancer · constellation Gemini
- ♃︎ Jupiter — 95.1° · sign Cancer · constellation Gemini
- ♄︎ Saturn — 146.1° · sign Leo · constellation Leo
- ☽︎ Moon 95% 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 gibbous, 95% lit; the Moon was 396,190 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
49 orbits of the Sun — 46,067 million km, that is 59,921 return trips to the Moon; 17,904 rotations of Earth; with the Sun — 355.8 billion km around the Galactic centre, 13.7 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 198 million km away; today it is 243 million km (farther by 1.2×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 21, right at the minimum (15% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on July 11, 2028; Jupiter — in 2036; a full moon exactly on this date — September 29, 2042
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,448″ 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.