‘Oumuamua: a shred of its former self

I once ordered a beer then straight away spilled it all over the bar. There was just a tiny sip left in the glass. Frowny face.

Remember ‘Oumuamua, the weird-shaped rock flying through the Solar System? Just like my sip of beer, it might only be a small piece of what it once was. … More ‘Oumuamua: a shred of its former self

Exo-moons: Innocent bystanders during gas giant instabilities

Gas giants are the bullies of planetary systems.  They are hundreds of times more massive than small rocky or icy worlds, so when gas giants throw a tantrum, their whole planetary system feels it. Giant planet moons are among the innocent bystanders swept up in the chaos. Giant planets around other stars have different orbits … More Exo-moons: Innocent bystanders during gas giant instabilities

Where did Earth’s (and the asteroid belt’s) water come from?

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 … More Where did Earth’s (and the asteroid belt’s) water come from?