Yes, detecting radio signals from other planets is one of the methods scientists use to search for extraterrestrial intelligence (SETI) and potentially detect signs of life on other worlds. This approach is based on the idea that advanced civilizations might use radio waves as a means of communication, just as humans have done on Earth.
The search for extraterrestrial radio signals involves using radio telescopes to scan the sky for any signals that appear unnatural or exhibit characteristics indicating they may be of intelligent origin. Scientists look for narrowband signals, which are signals concentrated at a specific frequency, as they are less likely to occur naturally and can be a potential sign of intelligent communication.
Several SETI projects, such as the SETI Institute's Allen Telescope Array and the Breakthrough Listen initiative, actively search for these signals. These projects employ sophisticated techniques to analyze vast amounts of data collected from radio telescopes, searching for any unusual patterns or signals that stand out from the background noise.
However, it is important to note that detecting radio signals from other planets is a challenging task. The signals would need to be strong enough to overcome background noise and interference, and they must also be directed towards Earth. Additionally, the vast distances between planets and the limited range of our telescopes make it a difficult endeavor. Nevertheless, scientists continue to explore this avenue in the hope of finding evidence of extraterrestrial intelligence.