See also: 1898 in science, other events of 1899, 1900 in science and the list of years in science.

Table of contents

1 Astronomy 2 Chemistry 3 Physics 4 Mathematics 5 Awards 6 Births 7 Deaths

Astronomy

• The 80 cm refracting telescope is completed at Potsdam Observatory.

• Actinium discovered by Andre Debierne.

• Ernest Rutherford classifies two types of radiation, alpha rays and beta rays.
• Henri Becquerel discovers that radiation from uranium consists of charged particles and can be deflected by magnetic fields.

• David Hilbert creates the modern concept of geometry with the publication of his book Grundlagen der geometrie.

• Copley Medal: Lord Rayleigh
• Wollaston Medal for Geology: Charles Lapworth

• January 12 - Paul Hermann Müller, chemist, winner of the Nobel Prize in Physiology or Medicine in 1948 (+ 1965)
• February 27 - Charles Best, medical scientist (+ 1978)