The sky on May 21, 1947 — as it really was
That day the Sun stood in Taurus — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 59.6° · sign Taurus · constellation Taurus
- ☽︎ Moon — 72.4° · sign Gemini · constellation Taurus
- ☿︎ Mercury — 66.4° · sign Gemini · constellation Taurus
- ♀︎ Venus — 31.7° · sign Taurus · constellation Aries
- ♂︎ Mars — 30.3° · sign Taurus · constellation Aries
- ♃︎ Jupiter — 231.8° · sign Scorpio · constellation Libra
- ♄︎ Saturn — 123.9° · sign Leo · constellation Cancer
- ☽︎ Moon 1% 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]
new moon, 1% lit; the Moon was 361,931 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
79.4 orbits of the Sun — 74,594 million km, that is 97,026 return trips to the Moon; 28,991 rotations of Earth; with the Sun — 576.1 billion km around the Galactic centre, 22.2 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 328 million km away; today it is 246 million km (closer by 1.3×).
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 April 5, 2028; Jupiter — in 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.