2 ms·
What artifacts are they leaving? Literally nothing has EVER been detected. The reasons why they listen to the hydrogen line is because it’s the most easiest to
by jonathankoren 5y ago
What artifacts are they leaving? Literally nothing has EVER been detected.
The reasons why they listen to the hydrogen line is because it’s the most easiest to detect. However, the 50 year timeframe isn’t really a problem. The entire sky has been measured multiple times in this 50 years, and nothing has been found. Unless you believe the signals passed 51 years ago, then the silence is deafening.