The sky on April 21, 1963 — as it really was
That day the Sun stood in Aries, while the horoscope says "Taurus". The gap is 23.4° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 30.7° · sign Taurus · constellation Aries
- ☽︎ Moon — 357.2° · sign Pisces · constellation Pisces
- ☿︎ Mercury — 50.0° · sign Taurus · constellation Aries
- ♀︎ Venus — 356.8° · sign Pisces · constellation Pisces
- ♂︎ Mars — 131.8° · sign Leo · constellation Cancer
- ♃︎ Jupiter — 4.1° · sign Aries · constellation Pisces
- ♄︎ Saturn — 321.6° · sign Aquarius · constellation Capricornus
- ☽︎ Moon 8% 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, 8% lit; the Moon was 361,840 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
63.5 orbits of the Sun — 59,634 million km, that is 77,568 return trips to the Moon; 23,177 rotations of Earth; with the Sun — 460.6 billion km around the Galactic centre, 17.8 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 171 million km away; today it is 245 million km (farther by 1.4×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 19, on the decline (86% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on April 2, 2027; Jupiter — in 2034; 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 3,168″ since that day; the real constellations now sit 23.4° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.