Arcs Quote by Nicolaus Copernicus
“The earth together with its surrounding waters must in fact have such a shape as its shadow reveals, for it eclipses the moon with the arc of a perfect circle.”
About This Quote
Source Treat: De Revolutionibus Orbium Coelestium, 1543
The Earth's shape and its shadow cause a perfect circular eclipse of the Moon, revealing its roundness.
In simple terms: The Earth's round shape creates a perfect circular eclipse.
Key Takeaway
Observe eclipses to understand Earth's shape.
Themes
astronomy
geometry
observation
Mood
curious
inquisitive
Type
scientific
educational
When to use this quote
- eclipse watching
- educational demonstrations
- science curricula
Key Concepts
celestial mechanics
shadow geometry
Questions to Reflect On
- How does eclipse observation support scientific literacy?
- What other phenomena reveal Earth's shape?
A Different Perspective
Eclipses can be obscured by weather, limiting observation.
![“[ When a religious couple wrote to Sagan about fulfilled prophecies, he wrote back in May 1996 :] If ‘fulfilled prophecy’ is your criterion, why do you not believe in materialistic science, which has an unparalleled record of fulfilled prophecy? Consider, for example, eclipses.” quote by Carl Sagan](https://sms4smile.com/quotes/img-quotes/875/carl-sagan-160_belief_when-a-religious-couple-wrote-to-sagan-a_25095.jpg)
