The Hubble Space Telescope is losing altitude with every orbit, pulled gradually closer to Earth by atmospheric drag that no onboard system can counteract. NASA has acknowledged the slow orbital decay and stated the telescope is not expected to reenter the atmosphere until the mid-2030s at the earliest. With no servicing missions flown since 2009 and no reboost plan currently funded, the agency is turning to commercial industry for ideas on how to keep one of science’s most productive instruments from becoming orbital debris.
Atmospheric Drag and a Shrinking Orbit
Hubble circles the planet at roughly 300 miles (483 km) above Earth’s surface, completing one orbit every 95 minutes at a speed of approximately 17,000 mph. Even at that altitude, trace amounts of atmosphere create enough friction to shave tiny increments off the telescope’s height with each pass. The effect is small on any given day, but it compounds over years. A peer-reviewed paper in Nature Astronomy confirmed that Hubble’s orbit is slowly decaying due to this drag, a finding consistent with NASA’s own public statements. Unlike the International Space Station, which receives periodic reboosts from visiting spacecraft, Hubble has no propulsion system and no current means of regaining lost altitude.
The physics are straightforward but unforgiving. As the telescope drops lower, it encounters denser air, which increases drag and accelerates the descent. NASA’s own Hubble FAQs state that the observatory is not expected to reenter Earth’s atmosphere until the mid-2030s at the earliest, though that projection depends on solar activity and long-term atmospheric behavior. Periods of high solar activity heat and expand the upper atmosphere, increasing drag on satellites in low Earth orbit and potentially shortening their lifetimes. To avoid an uncontrolled fall, NASA’s baseline planning has long envisioned attaching a propulsion module to guide Hubble either into a higher, safer orbit for a time or toward a precisely targeted reentry corridor over remote ocean.
No Servicing Since 2009
The last time human hands touched Hubble was during the STS-125 shuttle mission in May 2009, when astronauts replaced gyroscopes and batteries and installed upgraded instruments designed to extend the telescope’s operational life. That fifth and final servicing flight succeeded in keeping Hubble scientifically productive for well over a decade beyond its original design life, effectively giving astronomers a refurbished observatory in orbit. However, the retirement of the Space Shuttle program in 2011 closed off the only vehicle capable of reaching and physically repairing the telescope, leaving Hubble to age in place without any realistic prospect of traditional, crewed maintenance.
That aging has become increasingly visible in the telescope’s day-to-day operations. Equipment failures have resulted in fewer observations, and NASA officials told the Associated Press that the agency is not pursuing an immediate reboost, emphasizing the need to balance risk, cost, and scientific return. The gyroscopes installed during STS-125 have degraded over time, forcing mission controllers to adopt reduced operating modes that limit the telescope’s pointing flexibility and restrict how quickly it can move between targets. Each hardware failure narrows the range of science Hubble can perform, even as its orbit continues to shrink, creating a dual countdown: one clock tied to mechanical reliability, the other to orbital stability.
Commercial Reboost as a Lifeline
Rather than fund a government-led rescue, NASA has taken the unusual step of asking private industry to propose solutions at no direct cost to the agency. One path is an unfunded Space Act Agreement to study whether a commercial spacecraft could rendezvous with Hubble and raise its orbit. The agency has highlighted a feasibility effort with SpaceX and the privately funded Polaris program, led by entrepreneur Jared Isaacman, as a way to explore options without committing scarce government resources upfront. In parallel, NASA has used its primary agency portal to outline how commercial partnerships fit into a broader strategy of leveraging industry capabilities for complex orbital operations.
To cast a wider net, NASA issued a formal Request for Information on the federal SAM.gov procurement site, seeking concepts to reboost a satellite in low Earth orbit, with Hubble as the demonstration case. The notice specifies that any proposed work should come at no cost to the government, underscoring both budget pressure and the belief that companies may see value in demonstrating on-orbit servicing skills. Separately, the agency announced a focused study with SpaceX to examine whether a Crew Dragon or similar vehicle could safely dock with or grapple the telescope and push it to a higher altitude. That analysis, described in a dedicated mission update, carries no commitment to fly a mission, but it signals a major shift in how aging government satellites might be sustained or retired using commercial hardware.
Why a Controlled End Matters
Hubble weighs roughly 24,000 pounds and is about the size of a school bus, making it one of the largest single objects in low Earth orbit without its own propulsion. An uncontrolled reentry would scatter debris along a wide and unpredictable ground track, posing a small but nonzero risk to populated areas even though most of Earth’s surface is ocean. NASA’s disposition planning, reflected in its broader news releases, calls for attaching a propulsion module that would steer the telescope to a remote stretch of the South Pacific, far from shipping lanes and population centers. Achieving that outcome requires either a dedicated deorbit vehicle or a reboost mission that buys enough time for a controlled disposal to be arranged later, ideally in coordination with international spaceflight safety guidelines.
The stakes extend well beyond a single observatory. Low Earth orbit is becoming more crowded each year, with thousands of active satellites and tens of thousands of cataloged debris objects. Every large spacecraft that reenters without guidance adds to the statistical risk of ground impact and complicates efforts to maintain public confidence in space activities. Hubble is not just a piece of hardware, it is one of the most visible and scientifically valuable objects in orbit, and its fate will be watched closely by policymakers, engineers, and the public. A carefully managed end-of-life would demonstrate that even legacy missions can be retired responsibly, setting a precedent for how governments and companies handle large satellites in the decades to come.
A Test Case for the Future of Orbital Stewardship
How NASA ultimately handles Hubble could become a template for orbital stewardship in an era when commercial and government roles are rapidly evolving. If a private spacecraft successfully reboosts the telescope, it would validate a new model in which companies shoulder much of the operational cost in exchange for technical experience, brand visibility, or future servicing contracts. That, in turn, could accelerate the development of a market for on-orbit services such as refueling, relocation, and debris removal. NASA has already shown interest in this direction by using its official recent updates to highlight partnerships that treat space infrastructure less as disposable hardware, and more as assets that can be maintained and repurposed.
At the same time, the agency must weigh the scientific value of extending Hubble’s life against the operational risks of sending another spacecraft to rendezvous with a decades-old observatory. Even a purely robotic mission would involve complex proximity operations around fragile instruments that were never designed for docking with commercial vehicles. NASA’s public communications on its Hubble information pages emphasize that any decision will prioritize safety of the telescope, the crew of any visiting spacecraft, and people on the ground. Whether the final chapter involves a commercial reboost, a dedicated deorbit module, or a gradual, uncontrolled descent if all other options prove impractical, the way Hubble’s story ends will help define expectations for how humanity manages the growing population of large satellites that share its orbital neighborhood.
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*This article was researched with the help of AI, with human editors creating the final content.
