New Opportunities for Space Companies

Or, basic surface infrastructure for the Moon and Mars. I’ve written a few blogs about space stuff over the last couple of years but I’m not yet out of ideas. The usual disclaimers apply. As of May 2021, it looks like SpaceX has a reasonably solid lead in launch. This isn’t preordained to last forever, especially as copying a finalized Starship will be much easier for competitors, liberally salted with former SpaceX employees, than getting the design right in the first place. In the mean time, however, there are plenty of other worthy problems now that deep space transport seems, … Continue reading New Opportunities for Space Companies

The Unstoppable Battery Onslaught

I’ve written more than a few blogs about energy before. Why would I write another? I can’t think of a single reason. More seriously, I recently reviewed a personal whitepaper I wrote in January 2019 about battery economics and feel it is now time for it to see the light of day. The reasons for my reticence about publishing at the time should be obvious enough by the end of the post! No, I Will Not Shut Up About Solar And Batteries But first, a quick review. Slices of insights have made it into other, intervening posts. Most recently, I … Continue reading The Unstoppable Battery Onslaught

So you want to build a carbon capture company

Would you like to win one hundred million bucks from Elon Musk? Carbon capture (CC) is all the rage these days, with dozens of companies springing up to remove CO2 from the atmosphere and help stabilize the climate. I am not an expert on carbon capture but I do get asked about it from time to time. As a public service, therefore, I am offering the following rubric as a means to organize our thoughts, refine our strategy, and champion quantitative rigor when it comes to developing and evaluating a wide variety of carbon capture systems.  Is our carbon capture … Continue reading So you want to build a carbon capture company

Powering the Lunar Base

NASA’s selection of SpaceX’s Starship within the Human Lander System (HLS) program was both surprising and exciting for space nerds all over. Previously I have written about how Starship’s ambitious approach could transform the Artemis Program, particularly since Starship’s excessive cargo payload capacity creates a lot of opportunities that were previously curtailed by the harsh reality of razor thin Lunar mass budgets. As a rough rule of thumb, conventional approaches to Lunar transportation put cargo costs at upwards of $100m/T, while Starship should be able to get as low as $1m/T without any miracles, and perhaps as low as $100k/T … Continue reading Powering the Lunar Base

“The Martian” + Starship

“The Martian” by Andy Weir, and its film adaptation directed by Ridley Scott, remain some of my all time favorite science fiction works. Way back in the day I wrote a technical commentary. I last read the book in 2015 (until 2 weeks ago) and watched the film in 2018. More recently I’ve been exploring in detail how Starship changes the game with Lunar exploration and began to wonder what “The Martian” would look like with a Starship-based architecture, rather than the rather more expensive and complex architecture used in the book. If you haven’t read the book, do so … Continue reading “The Martian” + Starship

Lunar Starship and unnecessary operational complexity

This blog addresses the question of how SpaceX’s Starship could be used to ferry people and cargo to and from the Moon under a variety of different situations. It follows on from previous posts on Starship and Artemis, and Starship as a mechanism for space transport post scarcity. Broadly speaking, by the end of this post the reader should have a good idea of the variables and cost/benefit for various Starship-enabled transport systems. It’s worth stating at the outset that Starship is in a league of its own in the current field of lunar landers. Within the HLS program, the … Continue reading Lunar Starship and unnecessary operational complexity


This is a short, weird blog describing an experiment in travel story telling. During my misspent youth I did a lot of backpacking and hitchhiking. Here’s an index of trips, accounts, photos. I was largely inspired by the accounts of Vladimir Dinets, an accomplished zoologist who later became a friend and mentor. I’ve always been a map nerd and, largely stuck at home through most of 2020, I decided to revisit ideas I’d long been exploring about combining geographically relevant text-based narrative accounts with the wild data capacities of Google Earth. While cataloging my travel diaries I realized one was … Continue reading Geodiaries

Sea voyages

Recently I polled Twitter for outrageous sailing adventure stories. Here is a list of replies. If you have any others to include, please leave in comments. Alain Bombard crossed the Atlantic in 1952 in an open Zodiac with no supplies. Tim Severin and crew crossed the Atlantic in a leather coracle in 1976. David Lewis sailed to Antarctica in a small yacht in 1972. 1986 crossing the Atlantic in a Hobie cat. Tim Anderson’s attempting migration to Cuba. Someone sailed an open dinghy, solo, from Mexico to Tahiti in 214 or so days. Lost the link. The Batavia (1628). 1152 … Continue reading Sea voyages