The Alpha-Centauri medal was created by Hannes Alfvén, and is to be given to the first person who is able to prove whether the star Alpha-Centauri is made of either normal matter or anti-matter. The medal is held by the American Geophysical Union (AGU). A drawing of the medal can be seen in EOS Transactions, American Geophysical Union, vol. 70, p. 10, 1989.
The medal was inspired by questions in Klein-Alfvén Cosmology which ponders whether the Universe is matter-antimatter symmetric.
- C.-G. Fälthammar, A. J. Dessler, “Hannes Alfvén (1908 – 1995)“, Web site of the School of Electrical Engineering, Royal Institute of Technology, Stockholm
- Dessler, A. J., and H. Alfén (1989), Fiftieth William Bowie medal presented to Hannes Alfvén; Eos Trans. AGU, 70(1), 9.