Oblate spheroid

Smarties and the shape of the earth

The sphere is, according to Wikipedia, a reasonably correct model for earth. But mathematically the earth is  an oblate spheroid. An example of that would be smarties and M&Ms, spheres squished at the poles. As a result of gravitation and the rotation of earth, it is about 21 km longer than the Earth’s polar radius. This is, of course, ...
Control room – custom drawing

Control room – custom drawing

As mentioned in the post Mechanical owls – custom drawing, I am not the most efficient at xmas presents. So this is the custom drawing my brother got, a good few weeks after christmas. It is simply called the control room, for obvious reasons. There are some personal hints to my brother, but overall, it ...