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 Wednesday, 10 December 2025: day of Mercury
- Sunrise
- 08:58
- Sunset
- 17:23
- Next sunrise
- 08:59
A day hour lasts 42 min; a night hour, 1h 18m. Local time (Europe/Paris).
Day
- 1☿︎ Mercury08:58 – 09:40
- 2☽︎ Moon09:40 – 10:22
- 3♄︎ Saturn10:22 – 11:04
- 4♃︎ Jupiter11:04 – 11:46
- 5♂︎ Mars11:46 – 12:28
- 6☉︎ Sun12:28 – 13:10
- 7♀︎ Venus13:10 – 13:52
- 8☿︎ Mercury13:52 – 14:34
- 9☽︎ Moon14:34 – 15:16
- 10♄︎ Saturn15:16 – 15:58
- 11♃︎ Jupiter15:58 – 16:41
- 12♂︎ Mars16:41 – 17:23
Night
- 1☉︎ Sun17:23 – 18:41
- 2♀︎ Venus18:41 – 19:59
- 3☿︎ Mercury19:59 – 21:17
- 4☽︎ Moon21:17 – 22:35
- 5♄︎ Saturn22:35 – 23:53
- 6♃︎ Jupiter23:53 – 01:11
- 7♂︎ Mars01:11 – 02:29
- 8☉︎ Sun02:29 – 03:47
- 9♀︎ Venus03:47 – 05:05
- 10☿︎ Mercury05:05 – 06:23
- 11☽︎ Moon06:23 – 07:41
- 12♄︎ Saturn07:41 – 08:59
Other cities · France
Questions
How are the planetary hours calculated in Brest?
On Wednesday, 10 December 2025, the Sun rises at 08:58 and sets at 17:23: the day lasts 8h 25m, that is twelve day hours of 42 min. The night, until the next sunrise at 08:59, lasts 15h 36m: twelve night hours of 1h 18m.
Which planet rules the first hour that day?
Mercury, from 08:58 to 09:40: the first hour of a day always goes to the planet of the weekday. The next ones follow the Chaldean order: the Moon, Saturn, Jupiter, Mars, the Sun, Venus, then Mercury 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.