In-space manufacturing is the production of physical goods in orbit, where the near-absence of gravity changes how materials form in ways that can be difficult or impossible to reproduce on Earth. For years it lived almost entirely inside the International Space Station as research. Now capsules are returning finished product to the ground, a drugmaker has signed on to produce in orbit, and the people building the field say it is crossing from demonstration into a market.
Why Does Microgravity Change How Things Are Made?
On Earth, gravity drives processes that quietly degrade certain materials as they form. Heavier and lighter components separate, convection stirs liquids as they cool, and containers introduce contamination and stress. Remove gravity and those effects largely disappear, which matters most for materials whose value depends on near-perfect uniformity.
Optical fiber is the clearest example. A fluoride glass known as ZBLAN can carry far more data than the silica fiber that runs the internet, but when it is drawn on Earth, tiny crystals form that scatter light and make the fiber brittle. In orbit those crystals grow more slowly, so fibers can be drawn longer and clearer before defects set in. The same logic applies to protein crystals that assemble more uniformly for drug development, to semiconductor and ceramic materials, and to living tissue that holds its shape without a supporting scaffold.
What Is Actually Being Made in Orbit Today?
Most of it is still demonstration rather than mass production, but the demonstrations have grown serious.
Aboard the ISS, Redwire operates commercial manufacturing hardware that has run since the middle of the last decade, including an additive manufacturing facility and equipment that has drawn ZBLAN fiber. The company has bioprinted a living human heart tissue sample and returned it to Earth, and has expanded into facilities for crystal, ceramic, and superalloy processing. Its pharmaceutical crystal work has included research runs for Eli Lilly, one of the world’s largest drug companies, so the customers buying time in orbit are industrial as well as academic.
The clearest production milestone belongs to another company. Over roughly a month in early 2024, a Flawless Photonics payload aboard the station drew more than seven miles of ZBLAN, with several individual draws exceeding 700 meters, which NASA described as the first demonstration that commercial lengths of fiber could be produced in space. The agency was careful about what remained unproven: of four goals it had set for the project, the fourth, producing fiber ten times better in quality than the ground equivalent, depended on analysis of the samples after they came home.
Off the station, Varda Space Industries has built its business around a reusable capsule that processes drug compounds in orbit and returns them through the atmosphere. Its first mission brought back crystals of an antiviral drug, and by 2026 the company was flying repeatedly, returning its sixth mission to a range in South Australia that May, though that flight was a government-funded reentry test, not a drug production run. The commercial milestone came separately, in a partnership with the pharmaceutical company United Therapeutics that Varda’s leadership framed as evidence that drugmakers are beginning to treat microgravity as a manufacturing tool rather than a laboratory curiosity.
The Reentry Problem, and Why It Matters
Making something in orbit is only half the challenge. Getting it back to Earth affordably and on a predictable schedule is the other half, and for products destined for terrestrial customers, it may be the harder one.
This is why reentry capsules sit at the center of the manufacturing story instead of its margins. A capsule that can carry material to orbit, house a production run, and return to a controlled landing on the ground turns space into something closer to a remote factory floor with a shipping lane attached. The market for those vehicles is expanding quickly, with established players projecting larger capsules or higher flight rates and a wave of startups entering with demonstration missions planned. The economics still depend heavily on launch costs, and many in the field point to cheaper heavy-lift launch later this decade as the moment the numbers begin to close for goods made in orbit and sold below.
Cadence is becoming contractual rather than aspirational. Varda and the Australian range operator that recovers its capsules have signed an extended agreement covering a further twenty returns, which is the kind of commitment that treats reentry as scheduled logistics rather than an experiment repeated when funding allows.
Where Manufacturing Sits in the Wider Field
The industry groups three related activities under one acronym, ISAM: in-space servicing, assembly, and manufacturing. Servicing means repairing, refueling, or relocating satellites that are already in orbit. Assembly means building large structures once they are up there. Manufacturing is the third. All three sit at very different stages of development.
Servicing has the government money behind it. Northrop Grumman’s SpaceLogistics launched its Mission Robotic Vehicle on July 21, 2026, carrying robotic arms developed with the Naval Research Laboratory and three propulsion pods it will attach to aging satellites in geostationary orbit, which the company casts as a commercial first for robotic servicing. Astroscale and the refueling company Orbit Fab have a first refueling demonstration planned for the US Space Force, pairing a servicing spacecraft with a prepositioned fuel depot. Private capital has begun to follow, with Starfish Space raising more than $100 million in April 2026 to carry out contracted deorbit missions. Companies in the sector describe their contracts as bespoke and one at a time, and say they must first prove reliability before commercial demand arrives at scale.
Assembly is the furthest from reality. Everything flying today had to fit inside a rocket fairing, and building larger structures from separately launched parts remains a goal nobody has yet demonstrated. That constraint is why assembly is treated as the eventual keystone, since power-beaming arrays, orbital data centers, and full-size stations all need structures no fairing can hold.
Measured against those two, manufacturing looks advanced, which is why it attracts both the most confident commercial claims and the sharpest scrutiny.
An Industry That Disagrees With Its Biggest Government Partner
Industry argues that the ability to manufacture in space has been real for years, proven through a long run of ISS demonstrations, and that demand is already visible. Voyager Technologies reported that the commercial rack space on its planned Starlab station had sold out.
NASA reached a different conclusion about the timeline. In its March 2026 “Ignition” strategy, the agency floated replacing the original Commercial LEO Destinations model, standalone private stations, with a government-owned core module that companies could dock modules to, arguing the commercial business case for fully independent stations doesn’t yet hold up. Industry pushed back hard, and by June 2026 NASA reversed course, saying it would return to supporting standalone commercial stations after all. A June 2026 Government Accountability Office review, running alongside that reversal, flagged the same underlying risk: that commercial stations may take longer to field than planned and that a gap in U.S. orbital capability is possible. In July, NASA followed through, releasing a draft request for proposals for a Commercial Low Earth Orbit Destination Contract and restarting a competition that had been on hold for most of the past year. The disagreement was never about whether microgravity works. It was about whether a standalone commercial station could pay for itself before the ISS retires, and for now, industry’s view has won out.
The same uncertainty had reached the commercial crews who would tend that hardware in orbit, and the restarted competition is what puts their future stations back on the table.
Where the Conversation Continues: ISDC 2027
Questions like these, whether orbital production can pay for itself and what infrastructure it needs, are the substance of the International Space Development Conference, which brings together the researchers, companies, and agencies deciding them, and anyone with results of their own can watch the call for abstracts. The scale of the broader economy these industries are building toward is a story in itself, and manufacturing is one of its youngest and least settled corners.
ISDC 2027 takes place May 27 to 30, 2027, at the Sheraton Gateway Los Angeles Hotel near LAX, roughly a dozen miles up the coast from Varda’s El Segundo factory floor. Anyone weighing whether the orbital economy is arriving or still over the horizon can put that question directly to the engineers, founders, and agency staff working on it.
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Frequently Asked Questions
What does ZBLAN stand for, and who wants it?
ZBLAN is an acronym for its ingredients: zirconium, barium, lanthanum, sodium, and aluminum fluorides. Its appeal is to long-distance telecommunications and specialized sensing markets, where fiber that loses less light over distance can reduce the need for costly amplification equipment. The material is already made and used on Earth, so the buyers exist; the orbital pitch is a grade of fiber that gravity makes hard to achieve on the ground.
Has anything manufactured in space actually been sold on Earth?
Partly, and the claim deserves care. Redwire describes its station-drawn fiber as the first commercial product manufactured aboard the ISS and sold on Earth, an account carried on the ISS National Lab’s site. The independent record is more cautious: for years before the 2024 runs, observers noted that orbital fiber experiments were not converting into commercial production. What is settled is that quantities remain small enough that only high-value materials justify the trip.
How does the retirement of the ISS affect in-space manufacturing?
The ISS has hosted most orbital manufacturing research, so its planned retirement raises the question of where that work continues. One answer is that some of it does not need a station at all: free-flying capsules like Varda’s carry their own power, processing equipment, and heat shield, so they can operate whether or not a crewed platform is in orbit. Work that requires astronaut handling or a permanent rack, including much of the bioprinting and materials research, is the part most exposed if the station retires before its successors are flying.