Global Temperature Histogram from 1950 to Present Day. The spiral is interesting in that it allows for a non-linear approach to events. It combines both the linear aspect of a line and the cyclical nature of a circle. Time is often represented as a line to evoke its linear and infinite nature, or as a circle to emphasize the concept of cycles.

The Cartesian coordinates of 300 000 stars, in a system based on the equatorial coordinates as seen from Earth.