Note 12 — CHAPTER SEVEN ORIGIN OF COMETS AND METEORS
Reading edition
Perturbations will make very great changes in the orbits. The perihelion distance of Pons-Winnecke has increased twenty million miles or more in the past sixty years.
Reading edition
Perturbations will make very great changes in the orbits. The perihelion distance of Pons-Winnecke has increased twenty million miles or more in the past sixty years.