Century Quote by Gan De
“Every 12 years Jupiter returns to the same position in the sky; every 370 days it disappears in the fire of the Sun in the evening to the west, 30 days later it reappears in the morning to the east...[Observation in 4th century B.C.]”
About This Quote
Source Historical Text: Astronomical observations, 4th century B.C.
Jupiter’s cyclical motion and its periodic disappearance and reappearance illustrate predictable celestial patterns.
In simple terms: Jupiter follows a regular cycle in the sky.
Observe and respect natural cycles.
Themes
Mood
Type
When to use this quote
- navigation
- calendar planning
- educational curricula
- scientific research
Key Concepts
Questions to Reflect On
- What can we learn from ancient sky‑watching today?
- How do cycles influence human planning?
Ancient observations lack precise timing and modern verification.