Second unnamed (34,7)c/156 spaceship
| Second unnamed (34,7)c/156 spaceship | |||||||||
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| Pattern type | Spaceship | ||||||||
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| Number of cells | 647595 | ||||||||
| Bounding box | 47454 × 149100 | ||||||||
| Direction | Oblique | ||||||||
| Slope | 34/7 | ||||||||
| Period | 156 (mod: 156) | ||||||||
| Speed | (34,7)c/156 | (34,7)c/156 | ||||||||
| Heat | Unknown | ||||||||
| Kinetic symmetry | n | ||||||||
| Discovered by | FWKnightship | ||||||||
| Year of discovery | 2024 | ||||||||
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c-156spaceship.png){kind=link}
A currently unnamed (34,7)c/156 spaceship was constructed by FWKnightship on October 21, 2024.[1] It is an oblique spaceship based on the (34,7)c/156 Herschel climber.
Comparison to first (34,7)c/156
This spaceship is the second spaceship of its speed. The first one, which is also unnamed, is 38 times larger in population and 6000 times larger in bounding box.
With a period of 156, both (34,7)c/156 spaceships are tied for the lowest known period of any crawler-based engineered spaceship known so far; the 17c/45 orthogonal caterpillar has an overall period of 270, and the (23,5)c/79 waterbear has a full period of 158.
The overall morphology of the first (34,7)c/156 spaceship has been highlighted as remarkable, given that many other macro-spaceships resemble basic lines when zoomed out.[2] This also applies to this spaceship, although the two don't have the same shape.
The second spaceship is endemic with regard to the range-1 Moore isotropic non-totalistic rulespace, unlike the first, which works with S4c enabled. The spot where the second spaceship fails with S4c is the front of the rightmost line using the orientation that the .mc file is in.
History
The (34,7)c/156 Herschel climber was originally discovered by Dave Greene in April of 2013.[3] Sphenocorona rediscovered the reaction independently in September of 2014 in the context of reactions usable for engineered spaceships.[4][5] A dedicated thread on the ConwayLife.com forums was started in 2016 to compile prior mentions of technology related to this fuse as well as to further discussion on a potential spaceship, although this remained largely inactive until early 2019.
The first (34,7)c/156 was found in June 2023, slightly a year before the second.
The population and bounding box of the second spaceship can get minor improvements that haven't happened yet.
See also
References
- ↑ FWKnightship (October 21, 2024). Re: (34,7)c/156 caterpillar (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (June 6, 2023). Re: (34,7)c/156 caterpillar (discussion thread) at the ConwayLife.com forums
- ↑ Dave Greene (April 19, 2013). Re: Blockic splitters (discussion thread) at the ConwayLife.com forums
- ↑ Sphenocorona (September 6, 2014). Re: Interesting simple fuses (discussion thread) at the ConwayLife.com forums
- ↑ Sphenocorona (June 9, 2023). Re: (34,7)c/156 caterpillar (discussion thread) at the ConwayLife.com forums
- Patterns
- Spaceships with between 100,000 and 999,999 cells
- Periodic objects with minimum population between 100,000 and 999,999
- Patterns with between 100,000 and 999,999 cells
- Patterns found by FWKnightship
- Patterns found in 2024
- Outer-totalistically endemic patterns
- Isotropically endemic patterns
- Spaceships
- Spaceships with period 156
- Oblique spaceships
- Spaceships with slope 34/7
- Spaceships with speed (34,7)c/156
- Spaceships with unsimplified speed (34,7)c/156
- Spaceships with mod 156
- Spaceships with n symmetry
- Engineered spaceships
- Unnamed periodic objects