The sky on June 21, 1937 — as it really was
That day the Sun stood in Gemini — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 89.7° · sign Gemini · constellation Gemini
- ☽︎ Moon — 242.7° · sign Sagittarius · constellation Scorpius
- ☿︎ Mercury — 71.5° · sign Gemini · constellation Taurus
- ♀︎ Venus — 44.1° · sign Taurus · constellation Aries
- ♂︎ Mars — 229.8° · sign Scorpio · constellation Libra
- ♃︎ Jupiter — 295.3° · sign Capricorn · constellation Sagittarius
- ♄︎ Saturn — 4.6° · sign Aries · constellation Pisces
- ☽︎ 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]
waxing gibbous, 95% lit; the Moon was 405,551 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
89.3 orbits of the Sun — 83,910 million km, that is 109,145 return trips to the Moon; 32,612 rotations of Earth; with the Sun — 648.1 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 83 million km away; today it is 246 million km (farther by 3×).
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 October 2, 2027; Jupiter — in 2032; a full moon exactly on this date — June 20, 2035
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,464″ 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.