A crater on the Moon is named after him: see Kopff (crater).= = = Great Yarmouth = = =
ʌ WORD_BOUNDARY k ɹ eɪ t ə ɹ ɹ WORD_BOUNDARY ɔ n ð ə WORD_BOUNDARY m uː n WORD_BOUNDARY ɪ z WORD_BOUNDARY n eɪ m d WORD_BOUNDARY æ f t ə ɹ WORD_BOUNDARY h ɪ m WORD_BOUNDARY s iː WORD_BOUNDARY k ɑ p f WORD_BOUNDARY k ɹ eɪ t ə ɹ WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY ɡ ɹ eɪ t WORD_BOUNDARY j ɑ ɹ m ə θ WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY