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It has been more than a century since mankind dreamed of meeting intelligent life in space. There was a time when it was thought that there might be astronauts on Mars or Venus. However, that wish did not come true. Now, we are pinning our hopes on planets outside our solar system. Fortunately, many planets have already been discovered in galaxies other than our solar system. Generally, experts focus on planets similar to Earth. Have you ever thought about whether Earth is really an ideal place for life? Couldn’t there be a planet more hospitable to life than Earth? How ideal is Earth? What is a super-habitable planet? Top-class planets: Which planets can become super-habitable?