Radio signals have been broadcast by humans in one form or another since the early 1800s. The first audio radio broadcast was only in 1895. One may wonder why we have not heard back from anybody listening out there through programs like SETI (and why I have only seen one weird spike with SETI@Home on my brother's computer way back in the day). The answer lies in the fact that human-made radio waves have not traveled that far across the solar system in relative terms. The Daily Mail provided a map of the solar system with a 200 light year diameter, 100 light years in radius, representing the range of audio radio waves from Earth.
The map gives one a better understanding of just how vast the universe is.
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| Man's radio reach in the stars is just a drop in the bucket compared to the solar system |
The map gives one a better understanding of just how vast the universe is.
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