Why can we see “earth like” planets that are light years away but still debate how many planets are in our own solar system?

Question

Why can we see “earth like” planets that are light years away but still debate how many planets are in our own solar system?

In: Technology

Answer 1

We can detect Earth like planets not see them, we can work out the approximate distance from the star and the mass of the planet and work out what conditions might be like. https://youtu.be/AnYye_c8rI4