Bessel

英 美
  • 贝塞耳
  • be v.有;在;是;到达;拜访
  • but conj.但是prep.除...以外adv.仅仅;只pron.无不
Noun:
  1. German mathematician and astronomer who made accurate measurements of stellar distances and who predicted the existence on an 8th planet (1784-1846)