For example if the Betelgeuze system had a planet, with a theoretical large telescope on that planet and looked back at earth. It would see life and civilizations from the 15th century a.d. (~500 light years distance)
For example if the Betelgeuze system had a planet, with a theoretical large telescope on that planet and looked back at earth. It would see life and civilizations from the 15th century a.d. (~500 light years distance)
Then they would see the Earth at whatever detail was possible for them and nothing would be any different. Looking at another planet is like taking pictures of remote areas of our planet with satellites orbiting Earth, the animals and planets being phographed are inlmpacted in no way.
If you are asking about how it would affect the alien species to know people exist it would be necessary to understand their culture and biology first.