Author Archives: Jonathan Goff

Jonathan Goff

About Jonathan Goff

Jonathan Goff is a space technologist, inventor, and serial space entrepreneur who created the Selenian Boondocks blog. Jon was a co-founder of Masten Space Systems, and is the founder and CEO of Altius Space Machines, a space robotics startup in Broomfield, CO. His family includes his wife, Tiffany, and five boys: Jarom (deceased), Jonathan, James, Peter, and Andrew. Jon has a BS in Manufacturing Engineering (1999) and an MS in Mechanical Engineering (2007) from Brigham Young University, and served an LDS proselytizing mission in Olongapo, Philippines from 2000-2002.

Random Thoughts/Rocket Legos: Masten Xephr as a Vulcan SRB Replacement?

Posted on May 5, 2017 by Jonathan Goff

I’m sick at home today, so had extra time to think about fun technical concepts, so here’s an interesting one to think about. Right now, ULA’s plans for Vulcan include using expendable Orbital ATK GEM 63XL sold strapon boosters to … Continue reading →

Posted in Launch Vehicles, MSS, Random Thoughts, Rocket Legos, ULA | 7 Comments

Random Thoughts: RLVs and Megaconstellations

Posted on April 14, 2017 by Jonathan Goff

Last month I was out in Washington DC for a satellite industry conference (the 2017 Satellite Show). My startup has been working on a cool satellite servicing related project that I need to blog about soon, and we were out … Continue reading →

Posted in Blue Origin, Business, Launch Vehicles, MSS, Random Thoughts, RLV Markets, Space Transportation, SpaceX | 12 Comments

Random Thoughts: First Pass Analysis of a White Dragon/Xeus Lunar Sortie Mission

Posted on February 28, 2017 by Jonathan Goff

After yesterday’s SpaceX announcement of having booked two customers for a Apollo-8 style mission around the Moon and back, using Falcon Heavy and Dragon V2, I got thinking about ways to take the next step in lunar tourism–surface missions. Now, … Continue reading →

Posted in Commercial Crew, Launch Vehicles, Lunar Exploration and Development, Propellant Depots, Random Thoughts, Space Exploration, Space Transportation, SpaceX, ULA, YHABFT | 51 Comments

Random Thoughts: The Difference Between a Base and a Settlement (by Doug Plata)

Posted on January 3, 2017 by Jonathan Goff

There was an interesting comment by Doug Plata a few days ago that I wanted to repeat as a blog post. Background was discussing the idea of long-term stays on the Moon, similar to my old Lunar One Way to … Continue reading →

Posted in Lunar Commerce, Lunar Exploration and Development | 10 Comments

Random Thoughts: Throwing the Moon a Bone

Posted on November 18, 2016 by Jonathan Goff

[Note: This blog post was originally planned to be something significantly longer, triggered by one of Eric Berger’s recent Ars Technica articles. But running a bootstrapped startup gave me the choice of waiting until this was totally irrelevant, or saying … Continue reading →

Posted in Commercial Crew, Commercial Space, COTS, Lunar Commerce, Lunar Exploration and Development, Random Thoughts | 9 Comments

What are the Odds?

Posted on September 28, 2016 by Jonathan Goff

I wanted to expand on one thought from last night. If you have a launch vehicle that you want a reasonably good chance of reusing 1000x, it actually needs a lot better than a 1:1000 Loss of Vehicle probability for … Continue reading →

Posted in Launch Vehicles | 17 Comments

SpaceX Mars Plans: Jon’s First Take

Posted on September 28, 2016 by Jonathan Goff

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

I Think I’ve Found a Political Windmill Worth Tilting At

Posted on September 17, 2016 by Jonathan Goff

I usually try to keep partisan politics to a tolerable minimum on this blog, and I still intend to. But I had a crazy idea that I wanted to share somewhere other than Twitter. This year, a significant fraction of … Continue reading →

Posted in Politics | 28 Comments

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

Posted on September 5, 2016 by Jonathan Goff

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 4–Propellantless Horizontal Soft-Landing Methods

Posted on June 10, 2016 by Jonathan Goff

As mentioned previously in Part 2 of this series, one of the key elements in establishing a lunar beachhead is developing ways to safely and affordably land payloads and people on the lunar surface. In Part 3, we discussed a … Continue reading →

Posted in Lunar Commerce, Lunar Exploration and Development, Slings and Arrows of Outrageous Lunar Transportation Schemes, Space Development, Space Settlement, Space Transportation, Technology | 29 Comments