What would happens if we discovered a planet with alien life technologically 100 years behind us?

A planet (let’s call it Planet X) with a civilization 100 years behind us in technology is a real possibility within our own solar system. The furthest boundary of our Solar System extends up to 100,000 AU, i.e., 100,000 times the distance between Earth and the Sun or 1.87 light-years away. Interesting to note that…

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