NASA’s Neil Gehrels Swift Observatory has resumed science operations for its Ultraviolet/Optical and X‑ray telescopes after they were powered down earlier this year to reduce atmospheric drag while a commercial mission attempted to lift the satellite to a higher orbit.
What happened and what has restarted
The Swift team turned the two instruments back on on 26 August 2026. They had been deactivated in February 2026 to protect the spacecraft while engineers prepared for a rendezvous and boost by a privately built spacecraft called LINK, contracted to Katalyst Space under a NASA agreement.
A third instrument, the Burst Alert Telescope, was taken offline in April 2026 to conserve power while Swift’s solar arrays and attitude were optimised to lower aerodynamic drag. The team said it is working to return that instrument to data collection in the coming weeks.
Background: why the boost was attempted
Swift operates in low Earth orbit and lacks onboard propulsion sufficient to counter long‑term orbital decay caused by the residual atmosphere. Recent increases in solar activity thickened the upper atmosphere and accelerated the satellite’s loss of altitude. NASA estimated that switching to lower‑drag pointing modes would preserve Swift’s altitude above about 185 miles (300 kilometres) until around October 2026, but a longer extension required an external boost.
In September 2025 NASA awarded a contract to Katalyst Space to design, build, test and launch the LINK spacecraft and to perform a capture and lift of Swift. LINK launched in July 2026 on a Northrop Grumman Pegasus rocket, but encountered attitude control problems during proximity operations. On 19 August 2026 NASA and Katalyst announced that LINK would not proceed with the capture and boost; Katalyst will nonetheless continue rendezvous tests to demonstrate satellite servicing techniques.
| Instrument | Status (as of 26 Aug 2026) | Offline since |
|---|---|---|
| Ultraviolet/Optical Telescope | Operating | February 2026 |
| X‑ray Telescope | Operating | February 2026 |
| Burst Alert Telescope | Offline — returning soon | April 2026 |
Why Swift matters
For more than 21 years Swift has been a versatile rapid‑response observatory: it spans multiple wavelengths, slews quickly to transient events and sends alerts to other telescopes worldwide to co‑ordinate follow‑ups. Restoring two of its instruments returns much of that capability to the astronomical community.
However, the episode underscores a broader question about how long older spacecraft can be kept operational in low Earth orbit and what role commercial servicing will play. The LINK attempt was intended both to extend Swift’s life and to provide a demonstration of in‑space servicing techniques that could benefit many other missions.
- Immediate impact: Swift can again carry out ultraviolet, optical and X‑ray observations and resume issuing rapid alerts for transient phenomena.
- Near‑term task: engineers aim to return the Burst Alert Telescope to service within weeks, restoring Swift’s full instrument complement.
- Longer term: teams will monitor orbital decay carefully and evaluate options for future life‑extension, whether by further operational adjustments or by renewed servicing attempts.
The failure of LINK to capture Swift removes an immediate avenue for raising the satellite’s orbit, but it does not end efforts to develop on‑orbit servicing. Katalyst’s continued proximity operations will provide technical data about rendezvous and servicing procedures, albeit without the planned boost.
For astronomers, restoring Swift’s instruments is plainly welcome; for engineers and policymakers, the episode is a case study in the opportunities and risks of outsourcing delicate manoeuvres to new commercial players. The craft’s fate over coming months will depend on the balance of drag, solar activity and the success of operational measures to conserve altitude — variables that are forecastable only within recognised margins of uncertainty.
Swift’s return to science work illustrates both the resilience of a long‑lived mission and the growing pains of a space industry learning to perform complex maintenance beyond Earth’s surface.
