In 1995 a pair of scientists discovered a planet outside our solar system orbiting a solar-type star. Since that finding—which won the scientists a portion of the 2019 Nobel Prize in Physics—researched have discovered more than 4,000 exoplanets, including some Earth-like planets that may have the potential to harbor life.
Source:
https://phys.org/news/2020-06-intelligent-life-planets-technosignatures-clues.html