Categories: Alternative conceptions
An example of a historical conception that would be considered a misconception today: Kepler seemed to think that cold was a distinct entity in its own right, alongside heat:
"On the other hand, light bleaches colours in time, since here it acts on matter qua matter, making it hot and expelling the contrary cold which is embedded in the body's matter and is not on its surface."
Johannes Kepler (1609) New Astronomy based upon Causes or Celestial Physics (Trans. William H. Donahue, 2015) Green Lion Press.
