The asteroids may be cosmic refugees, ejected from their homes to wander the Solar System, eventually settling in the asteroid belt.

Imagine a dry Earth. No waterfalls. No oceans. No beer (or people to drink it).  A sad place. Water is pretty important stuff.  In this post we will go deep into how Earth got its water (much deeper than in this post from a while back).  And since it’s connected with how Earth formed, our…

At a Solar System party, in a room full of planets, the asteroid belt is full of angst. And it should be. It’s out of place. It’s wearing a clown outfit but it’s not a costume party. What makes the asteroid belt so different? Well, for one, it’s not just one object like each individual…

This post could also be titled: How blogging and social media help make science happen. Here is the story.  Planet Nine was conjectured in late January 2016. In February 2016 I started to think about where Planet Nine may have come from. This led to 3 blog posts, each exploring a different origins story for…

It is hard to know where things come from. If I drink a Belgian-style beer brewed in Colorado using hops from Washington state and I live in France, where did the beer actually come from?  And what does that mean anyway? The cosmic situation is just as confusing.  We know where the planets are right…

We are discussing the origins of Planet Nine.  In part 1 we explored whether it could have been produced during an orbital instability in the early Solar System.  In part 2 we showed that Planet Nine could have been captured from another star.  Here we will explore another plausible idea that is a little less…