Category Archives: ISRU

An Updated Propellant Depot Taxonomy

After way too many years in the wilderness, the concept of orbital propellant depots and in-space refueling in general, are finally beginning to be taken seriously again in public circles. A couple of examples include: Elon’s announcement that he is … Continue reading

Posted in Commercial Space, ISRU, Lunar Commerce, Lunar Exploration and Development, Mars, NASA, Orbital Dynamics, Propellant Depots, Space Development, Space Exploration, Space Transportation, Venus | Leave a comment

Research Papers I Wish I Could Con Someone Into Writing Part I: Lunar ISRU in the Age of RLVs

One of the things I’d love to do if I were successful enough at Altius to afford it would be to sponsor graduate-level research into space technology, business, economics, and policy topics that I’m interested in. Not just because I … Continue reading

Posted in BFR, ISRU, Lunar Commerce, Lunar Exploration and Development, Research Papers I'd Like to Con Others Into Writing, Space Development | 21 Comments

Comment Bumping: Venus Electrolysis and Space Settlement Norwegian Perspective

Life has been busy enough lately that I haven’t been able to do many of my own blog posts, but I wanted to bring two recent comments from old Venus threads to the top to get them a little more … Continue reading

Posted in Comments, ISRU, Space Settlement, Venus | 16 Comments

SpaceX Mars Plans: Jon’s First Take

I’ve had a lot of friends ping me today about my thoughts on Elon’s Mars talk today. I was in a meeting when it happened, and literally was pinged by half a dozen people during the meeting… Now that I’ve … Continue reading

Posted in Commercial Space, ISRU, Launch Vehicles, Lunar Commerce, Mars, NASA, Propellant Depots, Space Development, Space Exploration, Space Settlement, Space Transportation, SpaceX, ULA, Venus | 60 Comments

Random Thoughts: Which is a Better ISRU Propellant on Venus/Mars–LOX/LH2 or LOX/CH4?

I’m not sure if someone has already run the analysis, but I’m kind of curious about which ISRU-derivable propellant combination is better for locations like Venus or Mars where there is plenty of CO2 available in the atmosphere, but limited … Continue reading

Posted in ISRU, Mars, Venus | 14 Comments

The Slings and Arrows of Outrageous Lunar Transportation Schemes: Part 0–An Elevator Pitch for the Moon

[Note: After getting a few posts into this series on the “how” of alternative lunar transportation concepts, I realized that some commenters were asking about why we should even be going to the Moon, or what we’d be doing there. … Continue reading

Posted in ISRU, Lunar Commerce, Lunar Exploration and Development, Slings and Arrows of Outrageous Lunar Transportation Schemes, Space Development, Space Exploration, Space Settlement | 15 Comments

The Slings and Arrows of Outrageous Lunar Transportation Schemes: Part 3–Intentional Hard Landings

The first advanced lunar transportation concept is the idea of intentional hard lithobraking landings of bulk raw materials. The idea was recently suggested by frequent Selenian Boondocks commenter Paul Dietz in the comments to this previous post. Basically you would … Continue reading

Posted in ISRU, Lunar Commerce, Lunar Exploration and Development, Slings and Arrows of Outrageous Lunar Transportation Schemes, Space Development, Space Settlement | 50 Comments

The Slings and Arrows of Outrageous Lunar Transportation Schemes: Part 2–The Beachhead Analogy

This observation may already be bleedingly obvious to everyone else, but I feel it is worth explicitly stating: One of the top priorities of early missions to any destination in the solar system should be to drive down the cost … Continue reading

Posted in ISRU, Lunar Commerce, Lunar Exploration and Development, Slings and Arrows of Outrageous Lunar Transportation Schemes, Space Settlement, Space Transportation | 30 Comments

ESIL-8 Elements of Lunar Commerce Presentation

I was invited to give a talk on lunar commerce at a Emerging Space Industry Leaders workshop last week hosted by ULA at their Centennial, Colorado campus, and put on by my friends at Advanced Space LLC and the FAA … Continue reading

Posted in Altius Space Machines, Business, Commercial Space, ISRU, Launch Vehicles, Lunar Commerce, Lunar Exploration and Development, MHD Aerobraking and TPS, NASA, NEOs, Propellant Depots, Space Development, Space Settlement, Space Transportation, SpaceX, Technology, ULA, Variable Gravity | 36 Comments

Venus ISRU Latest Thoughts

A friend sent me this YouTube video earlier this morning: While this video really covers a lot of the same ground as previous posts in my Venus ISRU series, it still got me thinking about where we stand as far … Continue reading

Posted in ISRU, Venus | 39 Comments