Author Archives: Jonathan Goff

Up in ARMs for No Good Reason

While there has been some slightly more positive discussion about the NASA Asteroid Redirect Mission since my previous blog post and SpaceNews Op-Ed, there have still been a steady stream of criticisms and suggestions of alternatives to the ARM mission … Continue reading

Posted in NASA, NEOs | 11 Comments

YHABFT: MIT MarsOne Analysis — Alternative Solutions to the Excess O2 Problem

A few months ago, a group at MIT did an analysis of the MarsOne mission that was fairly critical of the concept, on technical grounds. This week’s FISO telecon featured an update on the analysis they performed, particularly on the … Continue reading

Posted in ISRU, Space Settlement | 15 Comments

Random Thought: Simulating Mars Speed-of-Light Delays on ISS

[Note: I’m almost positive this isn’t a new idea, but I figured I would share it, just in case.] One of the many concerns with deep-space human spaceflight missions, is that all of NASA’s experience has been with missions close … Continue reading

Posted in Lunar Exploration and Development, NASA, NEOs, Space Exploration | 16 Comments

PhD Dissertation Idea: NEO Trade Network Analysis

Frequently I wish I could afford to have a personal orbital dynamics minion that I could have run analyses for me whenever I have a complex orbital dynamics question and would like to test my intuition. Unfortunately, Altius isn’t successful … Continue reading

Posted in NEOs, PhD Dissertation Ideas | 11 Comments

Top 10 Reasons Why Something ARM-like Is Worth Doing

[Up-front Disclaimer: My space startup is being paid under the Asteroid Redirect Mission BAA to do a study contract on one possible way to do the Option B mission. Even though we’re not dependent on follow-on work, I figured it … Continue reading

Posted in Commercial Crew, International Space Collaboration, ISRU, Lunar Exploration and Development, NASA, NEOs, Space Development, Space Exploration | 23 Comments

Wild Data-Free Speculation on the SpaceX Landing Attempt

First, before saying anything else–congrats SpaceX! Both on the successful launch, and on coming so close to a successful recovery as well! If SpaceX’s competitors aren’t feeling the heat yet, I don’t know when they will. As most of you … Continue reading

Posted in SpaceX | 16 Comments

Random Thought: Dragon V2 as an xGRF Platform?

Review: How Much Gravity Do We Need, and Why Do We Care? One of my hobby horses that I’ve blogged about a few times is the question of how much gravity do humans need to be healthy? As I’ve pointed … Continue reading

Posted in Commercial Crew, Commercial Space, NASA, Space Development, Space Settlement, Space Tethers, SpaceX, Variable Gravity | 30 Comments

YHABFT: Perspective and Probability Estimation (SpaceX Edition)

I had a quick thought about SpaceX that I wanted to blog about instead of doing a bunch of tweets. Basically, I think that how you judge SpaceX’s probability of success probably should depend strongly on whether you’re thinking as … Continue reading

Posted in SpaceX, YHABFT | 7 Comments

Random Thought: Venus Really-Balloon Rockets

I haven’t run the numbers on this yet, but I was thinking about how to do reusable transportation on Venus recently. My previous Venusian Rocket Floaties blog post showed that existing upper stages, sealed off, could float at altitudes high … Continue reading

Posted in Launch Vehicles, Space Transportation, Venus | 10 Comments

Integral Payload Fairing Habitats

In the spirit of my previous post promoting healthy, competitive industries, I wanted to toss out an idea I’ve had for several years about an alternative to inflatable structures for providing large volume pressurized space facilities. The idea is a … Continue reading

Posted in Bigelow Aerospace, Commercial Space, Space Development | 12 Comments