How many aliens planets can see Earth? More than we first thought

In 2020, a pretty cool research paper was published. In it, the astronomers posited the question: What nearby stars are in the right spots on the sky to see Earth transit the Sun, and therefore any purported aliens living on planets around those stars might know we exist?

I wrote about this paper and how the geometry works at the time, so please take a moment to read that and come back here.

All done? So basically, the most successful method we have to detect exoplanets — aliens worlds orbitin...