100 Billion planets in our galaxy and....
We might be all alone.
Paradoxically, the more we discover planets around other stars, the more it's our own solar system that becomes exotic, uncommon, improbable!
From our knowledge of all discovered exoplanets, computer simulations show we are more special we thought.
There's an habitable zone in our solar system, but also in the galaxy.
BTW, at the time we reconsider the number of planets in our own solar system, we also discover there is a new nearby galaxy only 17,000 light years away (because it has a black hole at its center and stars of various ages), Omega Centauri !
It's an ever changing universe!