The sky on April 18, 1930 — as it really was
That day the Sun stood in Aries — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 27.7° · sign Aries · constellation Aries
- ☽︎ Moon — 271.0° · sign Capricorn · constellation Sagittarius
- ☿︎ Mercury — 44.7° · sign Taurus · constellation Aries
- ♀︎ Venus — 45.3° · sign Taurus · constellation Aries
- ♂︎ Mars — 355.2° · sign Pisces · constellation Pisces
- ♃︎ Jupiter — 74.8° · sign Gemini · constellation Taurus
- ♄︎ Saturn — 281.9° · sign Capricorn · constellation Sagittarius
- ☽︎ Moon 73% 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 gibbous, 73% lit; the Moon was 398,547 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
96.5 orbits of the Sun — 90,659 million km, that is 117,923 return trips to the Moon; 35,235 rotations of Earth; with the Sun — 700.2 billion km around the Galactic centre, 27 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 317 million km away; today it is 244 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 February 6, 2028; Jupiter — in 2037; 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 4,824″ 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.