The sky on December 7, 1977 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 23.6° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 255.3° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 210.3° · sign Scorpio · constellation Virgo
- ☿︎ Mercury — 275.8° · sign Capricorn · constellation Sagittarius
- ♀︎ Venus — 244.3° · sign Sagittarius · constellation Scorpius
- ♂︎ Mars — 131.4° · sign Leo · constellation Cancer
- ♃︎ Jupiter — 93.1° · sign Cancer · constellation Gemini
- ♄︎ Saturn — 150.5° · sign Virgo · constellation Leo
- ☽︎ Moon 15% 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, 15% lit; the Moon was 367,672 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
48.8 orbits of the Sun — 45,889 million km, that is 59,689 return trips to the Moon; 17,835 rotations of Earth; with the Sun — 354.4 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 123 million km away; today it is 244 million km (farther by 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 (17% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on November 1, 2026; Jupiter — in 2036.
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.