Reagan promised that the station would bring “quantum leaps in our research in science, communications, and in metals and lifesaving medicines.” It was also supposed to foster collaboration with Europe, Canada, and Japan while preserving America’s preeminence in space.

Then came the harsh realities of translating Reagan’s vision into hardware. Freedom’s cost was initially estimated at $8 billion. That number quickly doubled, leading to a series of painful design compromises that still failed to stop the budget bloat.

The station might not have been built at all were it not for the fall of the Soviet Union.

In 1993 the U.S. and Russia signed an agreement to work together on a new International Space Station. The merger gained broad U.S. support as a way to keep Russian scientists gainfully employed (rather than, say, building bombs for the Taliban) while rescuing both nations from space station projects that had become embarrassingly unaffordable.

Yet even with the Russian assist, the “$8 billion” space station has wound up costing the U.S. roughly $90 billion in construction and transportation over the 19 years it’s been operating. On top of that, we pay $3 billion to $4 billion a year to operate the station.

The Zarya Control Module off the ISS after it was mated with the Unity Node, right, in 1998. NASA

Those expenditures have put NASA in a bind: The ISS was designed to be a gateway to new deep-space missions, but the agency cannot afford such missions as long as it continues to fund the ISS. As a result, for nearly two decades, American astronauts and their international partners have had nowhere to go except a canned outpost circling just 240 miles above the ground.

That left the station with a lot of critics in the scientific community. “One unexpected side benefit of the ISS was in producing make-work projects for private industry like SpaceX to develop their rockets, and that would be useful down the road,” says Arizona State University physicist Lawrence Krauss. “But they probably don’t need that now, so no tears here if the project is terminated.”

A space station born to die

Even as the ISS was still under construction in 2009, the Obama administration announced a six-year plan to defund the station and bring about its demise. “In the first quarter of 2016, we'll prep and de-orbit the spacecraft,” ISS program manager Michael Suffredini said — “de-orbit” being a bureaucratic euphemism for “sending the thing to a flaming death.”

Under this plan, NASA would end the regular rocket boosts that keep the station’s orbit from shrinking as a result of atmospheric drag. As the ISS drifted lower, crew members would be evacuated and then powerful strapped-on rockets would execute a series of firings, steering the ISS deeper into Earth’s upper atmosphere.

Ultimately, the station was to have been steered into the Pacific Ocean, where there was little chance that debris would rain down on someone’s head.

Except that NASA and its congressional overlords kept giving the ISS reprieves. By 2014, the official line was that the U.S. would move out of the ISS but that the station itself would survive at least until 2024. The Trump administration’s decision is hardly a new move against the ISS. It’s just one more in a long list of death notices.

Anybody want a lightly used space station?

What happens to the ISS after 2025 is a complete unknown. “There are lots of potential uses,” says former astronaut Jeffrey Hoffman, now a professor at MIT. “Other partners could continue scientific investigations. Private enterprise could turn it into a space hotel. However, I don’t know how any of these schemes would provide the resources to keep the station going.”

The space-hotel concept appeals to the Russian space contractor RKK Energia, which recently proposed building an orbiting luxury resort (priced at $40 million per visit) using ISS-related hardware. But the resort would be housed in a new module that need not be part of the station itself.

In the U.S., Robert Bigelow, CEO of Bigelow Aerospace, has proposed building space hotels, but his plans also do not revolve around the ISS. This week he announced a new company, Bigelow Space Operations, to build separate, private space stations, culminating in a supersized model with “over 2.4 times the pressurized volume of the entire International Space Station” late in the 2020s.

A different kind of race

If the future of the ISS remains murky, so is NASA’s post-ISS strategy. At the unveiling of the 2019 budget proposal, acting administrator Robert Lightfoot declared that freed-up ISS funds would pay for “the return of humans to the moon for long-term exploration.”

That’s a new priority, but not exactly a new plan. Even before Trump came into office, NASA was pushing the Deep Space Gateway (since renamed the Lunar Orbital Platform-Gateway), a space station to be situated near the moon.