Due to the first strong commercial radio stations, our radio presence is now known out toover about 70 light-years.

Question

Quizplus · Accepted Answer

This is true. The first strong commercial radio stations were launched in the early 1900s and their signals have been traveling out into space for over 100 years. Based on the strength of these signals, our radio presence is estimated to have reached a radius of about 70 light-years.

Due to the First Strong Commercial Radio Stations, Our Radio