supernovae are exhausted stars rekindled by comets falling into them

An example of an (historical) alternative conception:

"So also the fixed stars, which are exhausted bit by bit in the exhalation of light and vapours, can be renewed by comets falling into them and then, rekindled by their new nourishment, can be taken for new stars. Of this sort are those fixed stars that appear all of a sudden, and that at first shine with maximum brilliance and subsequently disappear little by little."

Isaac Newton (1999) Mathematical Principles of Natural Philosophy (3rd edition, 1726): The authoritative translation (I. Bernard Cohen and Anne Whitman), University of California Press.

Author: Keith

Former school and college science teacher, teacher educator, research supervisor, and research methods lecturer. Emeritus Professor of Science Education at the University of Cambridge.