The Search for Planet Nine

It has been an exciting and turbulent couple of weeks in Planet Nine land. The OSSOS survey has released their full data set, which in addi...

Last year, just after Konstantin and I announced our hypothesis that a distant massive planet in an eccentr...

When I am not searching for Planet Nine, I am teaching classes here at Caltech and throughout the world. The most fun class is my online cl...

If I was to pick a single characteristic of daily (academic) life that never ceases to amaze, it would be the rate at which time flies. It ...

At the time we published our paper on Planet Nine, we were working on a companion paper, that we had hoped to finish that same day, that wo...

An interesting consequence of being asked the same question repeatedly, is that you stop thinking about the answer. Instead, you find yours...

In my last post I went into detail on ways in which our Planet Nine hypothesis could be wrong, and I suggested for you, if you’d like to b...