I just sent this to http://mathworld.wolfram.com/cgi-bin/comment.cgi Herschel: *Comments:*Current text: "A heptomino shaped like the astronomical symbol for Uranus (which was discovered by William Herschel)." Should read: "A heptomino shaped like the astronomical symbol for Saturn (first accurately described by Christiaan Huygens), but regrettably confused with William Herschel, the discoverer of Uranus, by early investigators of Conway's Game of Life. It should be called Huygens, or J heptomino." with a link to Golly's Lexicon: :*Herschel* (stabilizes at time 128) The following pattern which occurs at generation 20 of the B-heptomino. O.. O.O OOO ..O The name is commonly ascribed to the Herschel heptomino's similarity to a planetary symbol. William Herschel discovered Uranus in 1781. However, in point of fact a Herschel bears no particular resemblance to either of the symbols used for Uranus, but does closely resemble the symbol for Saturn. So the appropriate name might actually be "Huygens", but "Herschel" is now universally used by tradition. Herschels are one of the most versatile types of signal in stable circuitry. R-pentominoes and B-heptominoes naturally evolve into Herschels, and converters have also been found that change pi-heptominoes and several other signal types into Herschels, and vice versa. See elementary conduit. On 28 April 2015, Michael Simkin found the smallest known glider gun--a lone Huygens plus six Lazarushian blocks, period 120. ............o...........oo.....oo ............ooo.........oo.....oo ............o.o.................. ..............o............oo.... ...........................oo.... ................................. ................................. ................................. ....oo........................... ....oo........................... ................................. oo.....oo........................ oo.....oo........................ --rwg