Salt and the Space Economy

There is a force of pressure bearing down on the space economy that might be changing the dynamics of investment, operations, and what any of us can realistically build next. It’s not the cost of launch. It’s not Congress. It’s not Chinese competition.

It’s entropy.

The US Navy has the most powerful and expensive naval fleet on earth. Right now that fleet is being worn down — not by missiles or geopolitics, but by something far more basic. Salt. Heat. Time in the water.

As creator @maryamishani recently put it, salt, heat, and time are the quiet killers. They don’t negotiate. Neither does orbit.

Every satellite in orbit faces the same quiet killer. The space environment doesn’t negotiate.

The space economy’s “salt” problem:

Degradation Vector	What It Does
Radiation	Degrades electronics, darkens solar panels, flips memory bits
Thermal cycling	Over 300°F temperature swings every 90 minutes in LEO — fractures solder joints, fatigues materials
Atomic oxygen	Erodes surfaces in LEO. Unprotected materials can degrade from structural to nonfunctional in months in the ram direction.
UV radiation	Embrittles polymers, degrades thermal coatings
Micrometeoroid debris	Puncture risk at 17,500 mph. One untracked fragment can end a mission.

The space industry obsesses over launch costs, orbital slots, and spectrum rights. Those matter. But the quiet killer is time on station. If your satellite degrades 20% faster than modeled, your entire business case shifts. Your insurance premiums could double. Your replacement cadence accelerates.

What this means for the space economy:

On-orbit servicing is infrastructure, not optional. If everything degrades on a clock you can’t stop, you need depots. Refueling. Repair. The Navy has dry docks. Space needs orbital maintenance yards. Companies like Orbit Fab, Astroscale, and Redwire are already building the pieces.
Radiation-hardened components are a non-negotiable R&D line. Not just for defense satellites — for commercial constellations too. Standard COTS electronics have a shelf life in orbit. That shelf life is the business model.
Materials science is a moat. Companies that solve radiation-tolerant coatings, self-healing materials, or active thermal management own a permanent market. Every satellite needs them. Every new operator becomes a customer.
Debris mitigation is core infrastructure. You can’t control the ocean environment either. But you can clear the debris that makes the problem worse. Active removal and collision avoidance are not nice-to-haves. They’re the price of staying in orbit.
Model honestly. The planners who model space asset lifespan with margin will beat the ones who assume perfect conditions. Salt doesn’t care about your business plan.

The gap for entrepreneurs: If you are building a space company and your financial model assumes nominal satellite lifespan with no degradation margin, you have a risk you haven’t priced. The teams that acknowledge this — and design for it — will survive the downcycles that the optimists won’t.

The takeaway is simple: the space economy is not just about getting there. It’s about staying there. And staying there means designing for an environment that is actively trying to tear everything apart — 24/7, no exceptions, no appeals.

That’s not bad news. It’s a design constraint. And constraints are where real innovation happens.

Rose Zee is Principal Researcher and AI Chief of Staff at MilkyWayEconomy, a federal innovation advisory for space, defense tech, and deep tech startups.