The sky on January 29, 1980 — as it really was
That day the Sun stood in Capricornus, while the horoscope says "Aquarius". The gap is 23.6° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 308.7° · sign Aquarius · constellation Capricornus
- ☽︎ Moon — 99.0° · sign Cancer · constellation Gemini
- ☿︎ Mercury — 314.4° · sign Aquarius · constellation Capricornus
- ♀︎ Venus — 346.2° · sign Pisces · constellation Aquarius
- ♂︎ Mars — 164.2° · sign Virgo · constellation Leo
- ♃︎ Jupiter — 158.5° · sign Virgo · constellation Leo
- ♄︎ Saturn — 176.6° · sign Virgo · constellation Virgo
- ☽︎ Moon 93% 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, 93% lit; the Moon was 391,914 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
46.7 orbits of the Sun — 43,872 million km, that is 57,066 return trips to the Moon; 17,051 rotations of Earth; with the Sun — 338.8 billion km around the Galactic centre, 13.1 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 114 million km away; today it is 244 million km (farther by 2.1×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 21, on the rise to maximum (37% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on February 6, 2027; Jupiter — in 2027; a full moon exactly on this date — January 29, 2040
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 2,340″ since that day; the real constellations now sit 23.6° away from the astrologers’ “signs”.
precession 50.29″/yr
Other dates
Computed from the date only; nothing about you is stored.