The Human Radio Bubble in the Milky Way

The first AM radio broadcast was on Christmas Eve, 1906, and the opening ceremony of the 1936 Olympics is regarded as the first video signal powerful enough to be carried into space.


How far did human-generated radio and video signals travel since then? Our radio bubble is about 200 light years (the diameter of the small blue dot in the enlarged section below). Compared to the vast size of the Milky Way (which is just one of many galaxies in the universe), our own presence seems rather insignificant. 


[Click on picture to see it full size.]

Read more here: The Extent of Human Radio Broadcasts in the Milky Way | Geekosystem