Sky on May 21, 1997: where the Sun, Moon and planets really were

The real sky on May 21, 1997: Sun in Taurus (horoscope says "Gemini"), Moon 99% lit, planet positions from ephemerides.

The sky on May 21, 1997 — as it really was

That day the Sun stood in Taurus, while the horoscope says "Gemini". The gap is 23.8° of precession.

astronomy-engine ephemerides (VSOP87/ELP), IAU 1930 constellation boundaries. Positions accurate to a fraction of a degree.

Checkable facts with a tag and a source; the classical reading is in the chart.

The Moon that day [EXACT]
full moon, 99% lit; the Moon was 386,989 km away.
astronomy-engine
How far Earth has travelled since [EXACT]
29.4 orbits of the Sun — 27,603 million km, that is 35,904 return trips to the Moon; 10,728 rotations of Earth; with the Sun — 213.2 billion km around the Galactic centre, 8.2 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 143 million km away; today it is 246 million km (farther by 1.7×).
astronomy-engine; checked against JPL Horizons for 2026-09-14
Solar cycle [ESTIMATE]
That day fell in solar cycle 23, right at the minimum (7% through the cycle).
SILSO smoothed minima
When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on June 25, 2027; Jupiter — in 2033.
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr
How far the sky has drifted since [EXACT]
The vernal point has shifted 1,476″ since that day; the real constellations now sit 23.8° away from the astrologers’ “signs”.
precession 50.29″/yr
Picture of the day [EXACT]
NASA Astronomy Picture of the Day for this date: apod.nasa.gov/apod/ap970521.html
NASA APOD

Computed from the date only; nothing about you is stored.