Just found out that I lost one of my mentors last week. A lot of him as a scientist and parent is in me today. I’m grateful for what he taught me, and that he believed in and supported me when I was looking for the next step in my career.

Particle physics X help me out: how fast do neutrinos of a given energy travel? I think they are generated with a definite energy, but in a superposition of three different mass eigenstates. Since their velocity depends on their mass, how does one predict their time of flight?

Yes, it is much harder to cool things in space than on Earth. But you also need to collect energy with solar panels, which actually gives you all the area you need to do the radiation. I am not sure our tech lords understand this, but it’s actually not a huge showstopper?

Since the waste heat associated with computers and space seems to be all the rage on social media these days, I’ll point out this paper I wrote on the theoretical maximum number of computations. You can do giving that it’s hard to cool things in space: iopscience.iop.org/article/1…

My vibe read from Phil is that space offers a few factor of ~2 advantages (continuous daylight) and *lots* of big disadvantages to the engineering. The biggest advantage is practical: space avoids the high cost and delay of regulation and feedback on the environment on Earth.