The sky on May 21, 1937 — as it really was
That day the Sun stood in Taurus, while the horoscope says "Gemini". The gap is 23.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 60.0° · sign Gemini · constellation Taurus
- ☽︎ Moon — 198.4° · sign Libra · constellation Virgo
- ☿︎ Mercury — 45.6° · sign Taurus · constellation Aries
- ♀︎ Venus — 22.1° · sign Aries · constellation Pisces
- ♂︎ Mars — 237.7° · sign Scorpio · constellation Libra
- ♃︎ Jupiter — 297.3° · sign Capricorn · constellation Sagittarius
- ♄︎ Saturn — 2.6° · sign Aries · constellation Pisces
- ☽︎ Moon 87% 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]
waxing gibbous, 87% lit; the Moon was 402,902 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
89.4 orbits of the Sun — 83,990 million km, that is 109,249 return trips to the Moon; 32,643 rotations of Earth; with the Sun — 648.7 billion km around the Galactic centre, 25 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 77 million km away; today it is 246 million km (farther by 3.2×).
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 September 1, 2027; Jupiter — in 2032.
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,500″ 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.