Difference between revisions of "Pre-pulsar spaceship"
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'''Pre-pulsar spaceship''' (or '''PPS''' for short) is any of three different [[period]] [[:Category:Spaceships with period 30|30]] [[:Category:Spaceships with speed c/5|c/5]] orthogonal [[spaceship]]s in which a [[pre-pulsar]] is pushed by a pair of [[spider]]s. The back [[spark]]s of these spaceships can be used to perturb [[glider]]s in many different ways, allowing the easy construction of c/5 [[puffer]]s. | '''Pre-pulsar spaceship''' (or '''PPS''' for short) is any of three different [[period]] [[:Category:Spaceships with period 30|30]] [[:Category:Spaceships with speed c/5|c/5]] orthogonal [[spaceship]]s in which a [[pre-pulsar]] is pushed by a pair of [[spider]]s. The back [[spark]]s of these spaceships can be used to perturb [[glider]]s in many different ways, allowing the easy construction of c/5 [[puffer]]s. | ||
The first pre-pulsar spaceship, the '''symmetric pre-pulsar spaceship''' (or '''SPPS''' for short) was found by [[:Category:Patterns found by David Bell|David Bell]] in May [[:Category:Patterns found in 1998|1998]] and was based on a period [[:Category:Spaceships with period 15|15]] pre-pulsar spaceship found by [[:Category:Patterns found by Noam Elkies|Noam Elkies]] in December [[:Category:Patterns found in 1997|1997]]. | The first pre-pulsar spaceship, the '''symmetric pre-pulsar spaceship''' (or '''SPPS''' for short, shown below) was found by [[:Category:Patterns found by David Bell|David Bell]] in May [[:Category:Patterns found in 1998|1998]] and was based on a period [[:Category:Spaceships with period 15|15]] pre-pulsar spaceship found by [[:Category:Patterns found by Noam Elkies|Noam Elkies]] in December [[:Category:Patterns found in 1997|1997]]. | ||
The '''asymmetric pre-pulsar spaceship''' (or '''APPS''' for short, shown below) was found by [[:Category:Patterns found by Alan Hensel|Alan Hensel]], also in May 1998. | |||
The third period 30 pre-pulsar spaceship, shown to the right, is similar to the symmetric pre-pulsar spaceship but contains an extra [[T-tetromino]] between the spiders. | |||
==Image gallery== | ==Image gallery== | ||
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|[[Image:spps.png|framed|left|The original symmetric pre-pulsar spaceship.<br />{{JavaRLE|spps}}]] | |[[Image:spps.png|framed|left|The original symmetric pre-pulsar spaceship.<br />{{JavaRLE|spps}}]] | ||
|[[Image:apps.png|framed|left|The asymmetric pre-pulsar spaceship.<br />{{JavaRLE|apps}}]] | |||
|} | |} | ||
==External links== | ==External links== | ||
*[http://www.argentum.freeserve.co.uk/lex_p.htm#pps Pre-pulsar spaceship] at the Life Lexicon | *[http://www.argentum.freeserve.co.uk/lex_p.htm#pps Pre-pulsar spaceship] at the Life Lexicon | ||
[[Category:Patterns found by Alan Hensel]] |
Revision as of 12:56, 29 March 2009
Pre-pulsar spaceship | |||||||
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Pattern type | Spaceship | ||||||
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Number of cells | 132 | ||||||
Bounding box | 69 × 13 | ||||||
Direction | Orthogonal | ||||||
Period | 30 | ||||||
Mod | Unknown | ||||||
Speed | c/5 | Unknown | ||||||
Heat | 131.9 | ||||||
Discovered by | David Bell | ||||||
Year of discovery | 1998 | ||||||
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Pre-pulsar spaceship (or PPS for short) is any of three different period 30 c/5 orthogonal spaceships in which a pre-pulsar is pushed by a pair of spiders. The back sparks of these spaceships can be used to perturb gliders in many different ways, allowing the easy construction of c/5 puffers.
The first pre-pulsar spaceship, the symmetric pre-pulsar spaceship (or SPPS for short, shown below) was found by David Bell in May 1998 and was based on a period 15 pre-pulsar spaceship found by Noam Elkies in December 1997.
The asymmetric pre-pulsar spaceship (or APPS for short, shown below) was found by Alan Hensel, also in May 1998.
The third period 30 pre-pulsar spaceship, shown to the right, is similar to the symmetric pre-pulsar spaceship but contains an extra T-tetromino between the spiders.
Image gallery
External links
- Pre-pulsar spaceship at the Life Lexicon
- Patterns
- Spaceships with between 130 and 139 cells
- Periodic objects with minimum population between 130 and 139
- Patterns with between 130 and 139 cells
- Patterns found by David Bell
- Patterns found in 1998
- Spaceships
- Spaceships with period 30
- Orthogonal spaceships
- Spaceships with speed c/5
- Spaceships with heat between 130 and 139
- Patterns found by Alan Hensel