Comets Impact Cosmology

Glow discharge tube
Glow discharge tube

“Comets are important, they could be the key to the universe …maybe.” – Burt Lancaster, in the movie Local Hero. From Nature, 5, 174, December 28, 1871: “Encke’s Comet and the Supposed Resisting Medium,” by Professor W. Stanley Jevons. “The observed regular diminution of period of Encke’s comet is still, I believe, an unexplained phenomenon…