[imoreno]

This is neat, but the amount of data seems overkill just to see the trend in day/night length and the keogram is a bit busy. It seems like compressing each day to 1 px tall would result in a clearer representation of that.

It's neat that you can look at different things, like cloud cover, the moon, stars and anomalies (such as the aurora). But these are convoluted in the raw data. Deconvoluting these to obtain a keogram of just the sun, just the moon, just the anomalies would probably make for some interesting visualizations.