The sky on May 1, 2009 — as it really was
That day the Sun stood in Aries, while the horoscope says "Taurus". The gap is 24.0° of precession.
Bodies on the ecliptic (noon UTC)
- ☉︎ Sun — 41.2° · sign Taurus · constellation Aries
- ☽︎ Moon — 126.5° · sign Leo · constellation Cancer
- ☿︎ Mercury — 60.3° · sign Gemini · constellation Taurus
- ♀︎ Venus — 2.5° · sign Aries · constellation Pisces
- ♂︎ Mars — 6.9° · sign Aries · constellation Cetus
- ♃︎ Jupiter — 324.0° · sign Aquarius · constellation Capricornus
- ♄︎ Saturn — 165.1° · sign Virgo · constellation Leo
- ☽︎ Moon 46% 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]
first quarter, 46% lit; the Moon was 370,681 km away.
astronomy-engine - How far Earth has travelled since [EXACT]
17.4 orbits of the Sun — 16,380 million km, that is 21,306 return trips to the Moon; 6,366 rotations of Earth; with the Sun — 126.5 billion km around the Galactic centre, 4.9 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 313 million km away; today it is 244 million km (closer by 1.3×).
astronomy-engine; checked against JPL Horizons for 2026-09-14 - Solar cycle [ESTIMATE]
That day fell in solar cycle 24, right at the minimum (4% through the cycle).
SILSO smoothed minima - When the sky repeats [EXACT]
Mars returns to that day’s point of its orbit on February 21, 2028; Jupiter — in 2033; a full moon exactly on this date — May 1, 2045
sidereal periods: Mars 686.98 d, Jupiter 11.862 yr - How far the sky has drifted since [EXACT]
The vernal point has shifted 864″ since that day; the real constellations now sit 24° 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/ap090501.html
NASA APOD
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