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Astrology basics

Is a planetary hour always 60 minutes?

Traditional planetary hours divide local daylight and night into twelve parts each. Learn why their length can differ from a clock hour.

A ‘Venus hour’ sounds like a 60-minute slot. In traditional Western astrology, planetary hours follow local sunrise and sunset instead of starting on each clock hour.

Split daylight and night separately

Divide sunrise to sunset into twelve equal daytime parts. Then divide sunset to the next sunrise into twelve equal nighttime parts. The traditional system gives each part the name of one of seven chart bodies.

The length can change

The length of daylight changes with the date and place. When daylight lasts longer, each of its twelve parts lasts longer too. Nighttime parts follow the length of night. So a planetary hour need not last 60 minutes.

A traditional time label

A planetary-hour table may mark a part as a ‘Venus hour.’ This names a slot in an older timing system. It does not guarantee that anything special will happen during it.

A few common questions

Does the first planetary hour start at midnight?

No. In this traditional system, the first daytime part begins at local sunrise and the first nighttime part begins at sunset.

Sources & further reading

Astrology sources describe their own traditions and methods; they do not establish predictive accuracy. The writing exercises are original Lodestar editorial material.

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