The sky on March 15, 1931 — as it really was
That day the Sun stood in Pisces — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 353.9° · sign Pisces · constellation Pisces
- ☽︎ Moon — 312.5° · sign Aquarius · constellation Capricornus
- ☿︎ Mercury — 353.5° · sign Pisces · constellation Aquarius
- ♀︎ Venus — 311.0° · sign Aquarius · constellation Capricornus
- ♂︎ Mars — 117.7° · sign Cancer · constellation Cancer
- ♃︎ Jupiter — 100.6° · sign Cancer · constellation Gemini
- ♄︎ Saturn — 291.4° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon 13% 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, 13% lit; the Moon was 404,225 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
95.6 orbits of the Sun — 89,808 million km, that is 116,816 return trips to the Moon; 34,904 rotations of Earth; with the Sun — 693.6 billion km around the Galactic centre, 26.8 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 134 million km away; today it is 243 million km (farther by 1.8×).
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 February 15, 2027; Jupiter — in 2038; a full moon exactly on this date — March 15, 2052
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,788″ since that day; the real constellations now sit 22.9° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.