We've Learned So Much About Our Solar System

We've been excited to find what we thought were earth like planets in these other solar systems, ones about the right radius. What we don't know is if they really have the right composition to be in earth. If jupiter hadn't come through the inter solar system, earth might have been a little bit bigger and there migt have been more gas. And so it might be that a lot of the planets we're seeing in these otherSolar systems are not actually sort of habitable in the way that we would hope for.