The sky on April 21, 1929 — as it really was
That day the Sun stood in Aries, while the horoscope says "Taurus". The gap is 22.9° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 30.9° · sign Taurus · constellation Aries
- ☽︎ Moon — 182.6° · sign Libra · constellation Virgo
- ☿︎ Mercury — 35.3° · sign Taurus · constellation Aries
- ♀︎ Venus — 29.1° · sign Aries · constellation Pisces
- ♂︎ Mars — 108.6° · sign Cancer · constellation Gemini
- ♃︎ Jupiter — 47.8° · sign Taurus · constellation Aries
- ♄︎ Saturn — 270.4° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon 94% 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, 94% lit; the Moon was 387,467 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
97.5 orbits of the Sun — 91,586 million km, that is 119,128 return trips to the Moon; 35,595 rotations of Earth; with the Sun — 707.3 billion km around the Galactic centre, 27.3 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 233 million km away; today it is 246 million km (farther by 1.1×).
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 9, 2027; Jupiter — in 2036; a full moon exactly on this date — April 20, 2027
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 4,896″ 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.