The sky on December 10, 1939 — as it really was
That day the Sun stood in Ophiuchus, while the horoscope says "Sagittarius". The gap is 23.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 257.5° · sign Sagittarius · constellation Ophiuchus
- ☽︎ Moon — 252.6° · sign Sagittarius · constellation Ophiuchus
- ☿︎ Mercury — 238.1° · sign Scorpio · constellation Libra
- ♀︎ Venus — 281.6° · sign Capricorn · constellation Sagittarius
- ♂︎ Mars — 343.5° · sign Pisces · constellation Aquarius
- ♃︎ Jupiter — 359.3° · sign Pisces · constellation Pisces
- ♄︎ Saturn — 24.7° · sign Aries · constellation Pisces
- ☽︎ Moon 0% 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]
new moon, 0% lit; the Moon was 383,208 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
86.8 orbits of the Sun — 81,595 million km, that is 106,132 return trips to the Moon; 31,712 rotations of Earth; with the Sun — 630.2 billion km around the Galactic centre, 24.3 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 165 million km away; today it is 243 million km (farther by 1.5×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on May 4, 2028; Jupiter — in 2034; a full moon exactly on this date — December 9, 2030
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,356″ since that day; the real constellations now sit 23° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.