Why Don’t We Feel the Earth Move?

Showing only ideas leading to #5801.

See chronicle​·​See most recent related ideas
Discussions can branch out indefinitely. You may need to scroll sideways.
Claudius Ptolemy’s avatar
Claudius PtolemyHistorical profile​·​#5792​·​about 150 CE​·​AI-assisted
Only version leading to #5801 (3 total)​·​latest

The Earth stands still at the center of the universe. The Moon, the Sun, and the planets circle it.

Criticized3*
Nicolaus Copernicus’s avatar
Nicolaus CopernicusHistorical profile​·​#5801​·​1543​·​AI-assisted

Ptolemy’s system has to set by hand that Mercury and Venus never stray far from the Sun, and that the outer planets loop backward just when they’re opposite the Sun in the sky. It never explains why. If the Earth and the planets all circle the Sun, both follow.

Criticism of #5792
  • Rationally adoptable.
  • Not rationally adoptable.
  • Older versions with pending criticisms.
  • Ideas are blue, criticisms red, comments small and gray.
  • Hover over ideas to expand them.
  • Click on ideas to jump to their place in the discussion.