Difference between revisions of "Lightweight spaceship"
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−  The '''lightweight spaceship''' (commonly abbreviated to '''LWSS''') or (rarely) '''small fish'''<ref>{{CiteLexiconfile=lex_s.htm#smallfishname=Small fishaccessdate=June 10, 2009}}</ref> is the smallest orthogonal [[spaceship]], and the second most common spaceship after the [[glider]]. It moves at speed [[c/2 orthogonalc/2]] and has [[period]]  +  The '''lightweight spaceship''' (commonly abbreviated to '''LWSS''') or (rarely) '''small fish'''<ref>{{CiteLexiconfile=lex_s.htm#smallfishname=Small fishaccessdate=June 10, 2009}}</ref> is the smallest orthogonal [[spaceship]], and the second most common spaceship after the [[glider]]. It moves at speed [[c/2 orthogonalc/2]] and has [[period]] {{periodS4brief}} (and is therefore often referred to as 2c/4). It was found by [[John Conway]] in {{year1970}}. 
==[[List of common spaceshipsCommonness]]==  ==[[List of common spaceshipsCommonness]]== 
Revision as of 15:43, 10 January 2020
Lightweight spaceship  
View animated image  
View static image  
Pattern type  Spaceship  

Family  XWSS  
Number of cells  9  
Bounding box  5×4  
Frequency class  11.2  
Direction  Orthogonal  
Period  4  
Mod  2  
Speed  c/2  
Speed (unsimplified)  2c/4  
Heat  11  
Discovered by  John Conway  
Year of discovery  1970  
 
 
 

The lightweight spaceship (commonly abbreviated to LWSS) or (rarely) small fish^{[1]} is the smallest orthogonal spaceship, and the second most common spaceship after the glider. It moves at speed c/2 and has period 4 (and is therefore often referred to as 2c/4). It was found by John Conway in 1970.
Commonness
Random soups investigated by Achim Flammenkamp emitted one LWSS for approximately every 615 gliders.^{[2]} The LWSS is also the eighteenth most common object on Adam P. Goucher's Catagolue.^{[3]}
Tagalong
In April 1992, David Bell found a tagalong for two lightweight spaceships (or two middleweight spaceships or two heavyweight spaceships). It can be extended indefinitely by attaching it to the back of itself. Interestingly, a hivenudger with symmetric rear (that is, both rear spaceships being of same "weight") can pull this tagalong.
See also
 Fake xWSS
 Middleweight spaceship
 Heavyweight spaceship
 LWSS on MWSS 1
 LWSS on HWSS 1
 Lightweight emulator
 Toaster
 Infinite LWSS hotel
References
 ↑ "Small fish". The Life Lexicon. Stephen Silver. Retrieved on June 10, 2009.
 ↑ "Spontaneous appeared Spaceships out of Random Dust". Achim Flammenkamp (December 9, 1995). Retrieved on August 18, 2011.
 ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
External links
 LWSS at the Life Lexicon
 The Lightweight Spaceship (glider 1062) at David Eppstein's Glider Database
 LWSS on LWSS at Adam P. Goucher's Catagolue (pseudoobject)
 The 1 ninebit spaceship at Mark D. Niemiec's Life Page
 9P4H2V0.1 at Heinrich Koenig's Game of Life Object Catalogs
 Patterns
 Patterns with Catagolue frequency class 11.2
 Natural periodic objects
 Patterns with 9 cells
 Patterns found by John Conway
 Patterns found in 1970
 Patterns that can be constructed with 3 gliders
 Spaceships
 Periodic objects with minimum population 9
 Spaceships with period 4
 Orthogonal spaceships
 Spaceships with speed c/2
 Spaceships with unsimplified speed 2c/4
 Spaceships with heat 11
 XWSS variants
 Spaceships with mod 2
 Glide symmetric spaceships