Superstar / Third Stellation - Interlocking puzzle by Stewart Coffin (STC #50)

thingiverse

## ## Starlight / Third Stellation ### Interlocking puzzle by Stewart Coffin (STC #50) Assemble the six pieces into the polyhedral shape shown in the cover photo. If properly assembled with colors aligned as shown, _Starlight_ creates the appearance of triangular sticks running continuously through the length of the puzzle, although this is an illusion: the individual pieces are formed entirely from half-stick segments. _Starlight_ is related to Coffin's earlier designs [Sirius](https://www.thingiverse.com/thing:4122252) and [Nova](https://www.thingiverse.com/thing:4130743). All three use the same essential assembly mechanism, but with increasingly rich ornamentation: mathematically, _Sirius_ has the shape of the first stellation of the rhombic dodecahedron, _Nova_ the second stellation, and _Starlight_ the third. If you've already done _Sirius_ or _Nova_, don't expect a radically new solving experience out of this one, but it does make for a striking polyhedral sculpture that completes the "trilogy" in a satisfying way. Coffin wrote: "The six identical pieces mesh together easily in two identical subassemblies to form what is known by geometers as the third and final stellation of the rhombic dodecahedron. It is really more of a polyhedral sculpture than a puzzle, but it does create the interesting illusion of 12 triangular sticks, even though they are discontinuous .... To convert _Starlight_ into more of a puzzle, I proposed making it in four contrasting woods which must then be matched so that the sticks will not appear 'broken,' and I published that scheme in my book _Geometric Puzzle Design_. I must have then wandered off to other projects, for evidently I never actually made one." Coffin published the multi-color design under the alternate name _Third Stellation_, STC #50-B. Other woodworkers subsequently realized his vision and crafted copies of it, but it remains very rare. I hope this printable model enables many more people to enjoy this striking and beautiful design. Models are included for both the original, one-color _Starlight_, as well as the multi-color _Third Stellation_. ### Printing Instructions Two variants of this puzzle are provided with different color arrangements. The "monochrome" version is especially easy to print; just print six copies of `coffin.starlight.solid.stl`. (You can, of course, print the copies in different colors, and you might get an interesting color pattern out of it; but the colors won't follow the geometry of the puzzle in the way Coffin intended.) The five-color version (aka _Third Stellation_) is more involved, but it has the most satisfying final appearance. Print one copy of `coffin.starlight.fivecolor-bases.stl` and one copy each of `coffin.starlight.fivecolor-tips-1.stl` through `coffin.starlight.fivecolor-tips-4.stl`, each in a different color. Ideally, use a neutral color (such as white or grey) for the bases. The colored variant uses "snap joints" to enable printing in multiple colors, and you will need to connect all the joints before attempting to solve the puzzle. Press the male connector on each tip into its corresponding socket on the base piece. The eight distinct types of tips are designed to fit together in a specific way, so make sure to align them correctly. ### The Printable Puzzle Project The [Printable Puzzle Project](https://www.puzzlehub.org/ppp) aims to make available high-quality open-source models of many puzzle designs. All of our models are posted with the generous permission of their designers and are licensed for __non-commercial use only__. Anyone may print copies for their own personal use, but selling or otherwise monetizing them is not permitted, and puzzle designers retain all rights as copyright holders of their work. Our puzzles are modeled using the open-source [puzzlecad](https://www.thingiverse.com/thing:3198014) library. The `.scad` file is included with this model in case you want to modify any of its design parameters; more information on how to do this can be found in the PPP [Puzzle Modeling tutorial](https://www.puzzlehub.org/tutorials/puzzle-modeling). ### About the Designer Stewart Coffin has been called "the most outstanding designer and maker of interlocking puzzles that the world has ever seen". He is credited with over four hundred designs, has pioneered numerous ingenious puzzle forms, and has written extensively about puzzle design and craftsmanship. More information on Coffin, along with many other printable models of his designs, can be found on the [Stewart Coffin Puzzles](https://www.puzzlehub.org/puzzles/stewart-coffin) overview page. Happy puzzling!