Tag: 7.G.A.3

The Times Square ball

On New Year’s Eve, the iconic Times Square ball will descend to mark the start of year 2020. The ball isn’t really a ball. It is a geodesic icosahedron. What does that mean and how do you transform an icosahedron into this ball?

Fall Equinox, 2019

Monday, September 23, 2019 at 7:50 UTC (which is the same as 3:50 am EST), will be the Autumnal Equinox.  It is the time of year when the imaginary plane that passes through the Earth’s Equator would also travel through the…