Editing Talk:2121: Light Pollution
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: Suddenly penny dropped: it is <i>crystal lattice</i>!!!!!11 | : Suddenly penny dropped: it is <i>crystal lattice</i>!!!!!11 | ||
− | By the way, the way the lattice really works is that it's a geodesic sphere - sometimes, five triangles meet in a vertex to ensure that the surface closes on itself to form a sphere. | + | By the way, the way the lattice really works is that it's a geodesic sphere - sometimes, five triangles meet in a vertex to ensure that the surface closes on itself to form a sphere. Otherwise it'll be hard to form a sphere even with non-equilateral triangles, and the result won't look very uniform. |
[[Special:Contributions/173.245.48.63|173.245.48.63]] 21:28, 10 March 2019 (UTC) | [[Special:Contributions/173.245.48.63|173.245.48.63]] 21:28, 10 March 2019 (UTC) | ||
: Only if you restrict yourself to using equilateral triangles. If you're allowed to vary the lengths of the edges, then the sum of angles at the center of each "hexagon" will be less than 360 degrees, causing the "hexagon" to flex into a non-planar shape. If you're using these to construct cosmic structures, the difference needed would be minuscule and undetectable to the naked eye. [[User:Shamino|Shamino]] ([[User talk:Shamino|talk]]) 13:03, 12 March 2019 (UTC) | : Only if you restrict yourself to using equilateral triangles. If you're allowed to vary the lengths of the edges, then the sum of angles at the center of each "hexagon" will be less than 360 degrees, causing the "hexagon" to flex into a non-planar shape. If you're using these to construct cosmic structures, the difference needed would be minuscule and undetectable to the naked eye. [[User:Shamino|Shamino]] ([[User talk:Shamino|talk]]) 13:03, 12 March 2019 (UTC) |