Kees de Jager
- Category : 1921-births
- Type : PE
- Profile : 2/4 - Hermit / Opportunist
- Definition : Split - Small (12,35)
- Incarnation Cross : RAX The Four Ways 1
Dutch astronomer who specializes in predicting solar variation to assess the Sun's impact on future climate. He was the General Secretary of the IAU from 1967 to 1973 and former director of the observatory at Utrecht. He is a fellow with the Committee for Skeptical Inquiry.