Keck Telescope, 10 m mirror
Andrew Wiles, Proof of Fermat’s last theorem
23 January 1993 discovery of 6026 Xenophanes and 7430 Kogure
21 May 1993 discovery of 7433 Pellegrini
15 October 1993 discovery of 46610 Besixdouze
17 October 1993 discovery of 30933 Grillparzer
5 January 1993 Death of Nicholas Ulrich Mayall, in Tucson, Arizona, USA,
10 February 1993, Death of Bengt Edlén in Lund, Sweden
23 June 1993 Death of Zdeněk Kopal in Manchester, England
1993 Death of Harry Julius Emeléus
1993 Death of Albert Sabin
1993 Death of Donald William Kerst
Ralph Asher Alpher and Robert Herman won the Henry Draper Medal in 1993.
Chemistry "for contributions to the developments of methods within DNA-based chemistry", Kary B. Mullis "for his invention of the polymerase chain reaction (PCR) method" and Michael Smith "for his fundamental contributions to the establishment of oligonucleotide-based, site-directed mutagenesis and its development for protein studies"
Physiology or Medicine to Richard J. Roberts and Phillip A. Sharp "for their discoveries of split genes"