Planetary hours
in Brest.
The day, from sunrise to sunset, is cut into twelve equal hours; so is the night, from sunset to the next sunrise. Each hour carries a planet, in the Chaldean order. A planetary hour therefore lasts 60 minutes only at the equinoxes: it all depends on the date and the city. Here are the exact hours for your city; what you do with them is up to you.
Planetary day of Tuesday, 9 December 2025: day of Mars
- Sunrise
- 08:57
- Sunset
- 17:23
- Next sunrise
- 08:58
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1♂︎ Mars08:57 – 09:39
- 2☉︎ Sun09:39 – 10:21
- 3♀︎ Venus10:21 – 11:03
- 4☿︎ Mercury11:03 – 11:46
- 5☽︎ Moon11:46 – 12:28
- 6♄︎ Saturn12:28 – 13:10
- 7♃︎ Jupiter13:10 – 13:52
- 8♂︎ Mars13:52 – 14:34
- 9☉︎ Sun14:34 – 15:16
- 10♀︎ Venus15:16 – 15:58
- 11☿︎ Mercury15:58 – 16:41
- 12☽︎ Moon16:41 – 17:23
Night
- 1♄︎ Saturn17:23 – 18:41
- 2♃︎ Jupiter18:41 – 19:59
- 3♂︎ Mars19:59 – 21:16
- 4☉︎ Sun21:16 – 22:34
- 5♀︎ Venus22:34 – 23:52
- 6☿︎ Mercury23:52 – 01:10
- 7☽︎ Moon01:10 – 02:28
- 8♄︎ Saturn02:28 – 03:46
- 9♃︎ Jupiter03:46 – 05:04
- 10♂︎ Mars05:04 – 06:22
- 11☉︎ Sun06:22 – 07:40
- 12♀︎ Venus07:40 – 08:58
Other cities · France
Questions
How are the planetary hours calculated in Brest?
On Tuesday, 9 December 2025, the Sun rises at 08:57 and sets at 17:23: the day lasts 8h 26m, that is twelve day hours of 42 min. The night, until the next sunrise at 08:58, lasts 15h 35m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Mars, from 08:57 to 09:39: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Sun, Venus, Mercury, the Moon, Saturn, Jupiter, then Mars again.
Today’s sky, on YOUR chart
Planetary hours are the same for everyone in a city. Your chart is yours alone: every morning AstroXP crosses the real sky with your birth, to the minute, and tells you what time it plays out for you.
On a computer? Scan this code with your phone.
Calendars
Sunrise and sunset calculated for the city (the Sun’s centre 0°50′ below the horizon: refraction and semi-diameter), local time of the city’s time zone. Checked against astronomy-engine, the app’s engine.