Portal:History of science/Selected anniversaries/December 30
- 1552 - Birth of Simon Forman, English occultist and astrologer (d. 1611)
- 1644 - Death of Jan Baptist van Helmont, Flemish chemist (b. 1577)
- 1691 - Death of Robert Boyle, Irish scientist (b. 1627)
- 1924 - Edwin Hubble announces the existence of other galaxies
- 1934 - Birth of John Norris Bahcall, American physicist (d. 2005)
- 1947 - Death of Alfred North Whitehead, English mathematician and philosopher (b. 1861)
- 1993 - Death of Giuseppe Occhialini, Italian physicist (b. 1907)
- 1994 - Death of Dmitri Ivanenko, Russian physicist (b. 1904)