Charles' interest in astronomy was stimulated by the appearance of the spectacular, great six-tailed comet in 1744 and by an annular solar eclipse visible from his hometown on 25 July 1748.
Charlesov interes za astronomiju potaknula je pojava spektakularnog velikog šesterorepog kometa iz 1744. i pomrčina Sunca vidljiva iz njegovog rodnog grada 25. srpnja 1748.