The sky on April 18, 1947 — as it really was
That day the Sun stood in Pisces, while the horoscope says "Aries". The gap is 23.1° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 27.6° · sign Aries · constellation Pisces
- ☽︎ Moon — 353.7° · sign Pisces · constellation Aquarius
- ☿︎ Mercury — 3.3° · sign Aries · constellation Pisces
- ♀︎ Venus — 352.1° · sign Pisces · constellation Aquarius
- ♂︎ Mars — 5.1° · sign Aries · constellation Pisces
- ♃︎ Jupiter — 235.7° · sign Scorpio · constellation Libra
- ♄︎ Saturn — 122.1° · sign Leo · constellation Cancer
- ☽︎ Moon 9% 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, 9% lit; the Moon was 384,924 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
79.5 orbits of the Sun — 74,684 million km, that is 97,143 return trips to the Moon; 29,026 rotations of Earth; with the Sun — 576.8 billion km around the Galactic centre, 22.3 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 338 million km away; today it is 243 million km (closer by 1.4×).
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 March 3, 2028; Jupiter — in 2030; a full moon exactly on this date — April 18, 2030
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 3,996″ since that day; the real constellations now sit 23.1° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.