radio bubble (13. 449)

Via tmn, we enjoyed contemplating how much we’ve contributed to the cosmic conversation with the ever expanding shell of signals, every form of broadcast communication that has escaped the ionosphere and into the void of space. Though only a few missives were intentional and the vast scale of galaxy means that despite the impressive sounding volume of the bubble, two-hundred and forty light years across (the radius cubed of radio history multiplied by π times four-thirds, dating back to Marconi’s experiments at the turn of the last century, beamed out at the speed of light) only covers a vanishing small fraction of our own galactic local neighbourhood, still the silence (see above) is humbling and lonely. More from the Scientific Drop at the link above.