
 Stellation of Icosahedron 1 
This model is a stellation of the
icosahedron.
It looks similar to one of the models in Magnus Wenninger's Polyhedron
Models (#40, page 62), but whereas that one is hollow at the centre, this
one is not. There is only one type of facial plane, but I have used two
colours, by colouring top and bottom facing parts differently.

By default,
Great Stella
creates three types of nets, two for the red parts, and one for the
yellow parts. One red part has fivefold symmetry, and the other
threefold. I used
"Selection→Mouse Selection Mode→Cut/Uncut Edges"
to cut one of the central edges in the fivefold symmetry piece.
Great Stella
then creates only one type of net for the red parts, as shown here,
with threefold symmetry.


The trick is how to put the last piece in though! I did something
different for this. I cut some of the last parts up somewhat to
leave a hole in the model with five walls around it, and a final part
which would fit over these walls.


Glue is put on the five walls, and the final part can be put down over
it (if the cat doesn't try to get her paw in first). Once complete,
it's very hard to tell where the final piece went in.


One problem remains though. Three parts meet at each outer vertex,
or rather, they don't quite meet.


A bit of glue is required to hold the three parts together at each
vertex. It can be quite hard to hold them together by hand, so I
ended up making a couple of peaks from the
Five Tetrahedra model to
fit over them and hold them in place. I left a couple of points
gluing in this way each night.


The final model is very nice. It looks like the
Five Tetrahedra model, but with holes in it.
The slight splash of yellow from the bottomfacing parts adds a lot
too.

