He was a prolific discoverer of comets, discovering or co-discovering 21 in all, including Comet 55P/Tempel-Tuttle, now known to be the parent body of the Leonid meteor shower, and 9P/Tempel, the target of the NASA probe "Deep Impact" in 2005.
Warhammer 40.000 (neuradno poznana tudi kot Warhammer 40k ali samo 40k) je namizna taktična igra za dva igralca ali več, ki jo izdaja angleško podjetje Games Workshop.