The sky on September 18, 2000 — as it really was
That day the Sun stood in Virgo — sign and constellation agree here.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 175.9° · sign Virgo · constellation Virgo
- ☽︎ Moon — 53.0° · sign Taurus · constellation Aries
- ☿︎ Mercury — 196.4° · sign Libra · constellation Virgo
- ♀︎ Venus — 202.5° · sign Libra · constellation Virgo
- ♂︎ Mars — 150.9° · sign Virgo · constellation Leo
- ♃︎ Jupiter — 71.0° · sign Gemini · constellation Taurus
- ♄︎ Saturn — 60.9° · sign Gemini · constellation Taurus
- ☽︎ Moon 77% 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, 77% lit; the Moon was 378,037 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
26 orbits of the Sun — 24,475 million km, that is 31,836 return trips to the Moon; 9,512 rotations of Earth; with the Sun — 189 billion km around the Galactic centre, 7.3 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 376 million km away; today it is 245 million km (closer by 1.5×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 23, on the rise to maximum (34% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on January 18, 2027; Jupiter — in 2036; a full moon exactly on this date — September 17, 2035
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 1,296″ since that day; the real constellations now sit 23.9° 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/ap000918.html
NASA APOD
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