Daring rescue mission launches to save a 3,200-pound NASA observatory from an untimely end

A mission to save one of NASA’s historic space observatories from crashing into Earth has been launched in a bold, first-of-its-kind initiative.

If successful, this would mark the first time a commercial robotic mission has captured an uncrewed NASA spacecraft not designed for service in space, according to the agency.

Without intervention, the Neil Gehrels Swift Observatory will fall below a significant orbital threshold this month due to atmospheric drag and the impact of recent solar activity. For nearly 22 years, the observatory has studied a range of cosmic objects in different wavelengths of light.

The Swift operations team at Penn State University’s Eberly College of Science reduced power usage and oriented the observatory to look at the cosmos from a more streamlined position. But NASA estimates Swift will re-enter our planet’s atmosphere this fall after descending below its optimum altitude of about 185 miles (300 kilometers) above Earth.

Realizing that the Swift mission could end much earlier than expected, NASA called for a proposed solution.

“We didn’t want to set a precedent that anything coming out of orbit had to be accelerated, but this wasn’t just any spacecraft; this was an observatory with unique capabilities for astrophysics,” said Shawn Domagal-Goldman, NASA’s astrophysics division director, at a June 17 press conference.

The agency selected Arizona-based Katalyst Space Technologies for the mission in September, giving the company just nine months to design, build, test and launch a spacecraft that could rendezvous with Swift and accelerate its orbit.

The robotic satellite, called LINK, was launched from a Northrop Grumman Pegasus XL rocket launched by the company’s modified L-1011 aircraft, known as Stargazer.

Stargazer climbed to a strategic location 40,000 feet (about 12,000 meters) above Kwajalein Atoll, part of the Marshall Islands in the South Pacific Ocean, before crashing the rocket. At 4:36 a.m. Friday, the rocket’s engines activated, sending the satellite directly into Swift’s orbit. The launch comes after multiple weather delays, as well as a software issue that canceled Thursday’s launch attempt and was fixed in an update.

After the LINK satellite reached orbit, communication was successfully established by the teams on the ground.

Now, as LINK takes a series of steps to take over the 3,200-pound (1,452 kilogram) observatory and gradually raise Swift’s orbit to 370 miles (about 600 kilometers) above our planet, scientists must wait months to see if the seemingly impossible attempt works.

Domagal-Goldman had previously said: “No one thought we would get to where we have today and, to be honest, there are still risks ahead.” “But I am both deeply grateful and optimistic that we will overcome these challenges thanks to the people working on them.”

How to save a falling observatory

All satellites and spacecraft in low Earth orbit are subject to natural atmospheric drag that can reduce their altitude, especially if they do not have any propulsion capability.

The increase in solar activity over the past few years has magnified this effect as the sun reaches Earth, according to Swift. Peak of 11-year cycle.

The sun has met Solar maximum in 2024According to NASA, intense flares and coronal mass ejections that caused Earth’s atmosphere to expand only intensified the pressure on Swift. Swift’s mission could have ended naturally, but the NASA team wanted to try to expand its scientific observations because there was no ready replacement for the telescope and testing capabilities were needed for future discoveries.

“Swift was not designed to provide shuttle services,” said Ghonhee Lee, CEO of Katalyst Space. NASA version. “By demonstrating that we can quickly and cost-effectively extend its life, we are establishing a blueprint for servicing spacecraft that were never designed for in-orbit maintenance. If we are to build a permanent presence beyond Earth, we need the capacity to manipulate our environment in space. That means deploying robotic spacecraft that can reposition, repair, refuel and redeploy satellites after launch.”

The LINK satellite is about one-third the size of Swift, weighing 880 pounds (399 kilograms) and standing 5 feet (1.5 meters) tall. It is equipped with nearly 20 feet of solar panels and three robotic arms designed to catch Swift.

After testing its navigation and sensors in space for several weeks, LINK will conduct a survey of Swift to determine the best capture points at the observatory.

Although the Katalyst Space team identified some issues based on Swift’s design, the observatory’s multi-layered insulation may have degraded or shifted after being in orbit for more than two decades.

During service duties Hubble Space TelescopeAstronauts found that a similar coating on the telescope had disintegrated.

Kieran Wilson, LINK principal investigator at Katalyst Space, said of Hubble: “It kind of turned into a very delicate, almost glass-like substance.” “If you touch it, it shatters and keeps breaking. This is very different from the flexible plastic blankets that were put in place 20 years ago.”

Once it has Swift in hand, LINK will carefully fire its three ion thrusters and aim to slowly return the observatory to its original orbit over two to three months.

Once LINK achieves this feat, it will separate from Swift and re-enter the Earth’s atmosphere.

But for the mission to be successful, many firsts must occur in a row, and scientists said they hope the sun doesn’t spew unexpected activity that could derail operations or cause Swift to plummet more sharply than it already has.

“All of this is challenging and risky,” Wilson said. “There are many spacecraft that have much longer development cycles and much more funding behind them that fail for mundane reasons.”

If all goes as planned, Swift will resume all of its scientific observations in the fall rather than operating at its current limited capacity, said S. Bradley Cenko, Swift’s principal investigator at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

What makes Swift worth saving?

Swift was launched in 2004 to study gamma-ray bursts, the most powerful explosions in the universe. Cenko said more than 2,000 sources of these high-energy explosions that create heavy elements such as gold and platinum have been identified.

But Swift has also evolved to study a much wider range of cosmic objects in visible, ultraviolet, X-ray and gamma-ray light.

The observatory is named after fast-flying birds due to its ability to rotate quickly to look at cosmic events and afterglows, allowing the study of comets, gravitational waves and black holes over long periods of time.

Cenko said Hubble could have much greater sensitivity and capture clearer images than Swift, but it could take a day or two for the large space telescope to reposition itself to point at the target of interest. On the other hand, Swift can act as NASA’s first responder in space if celestial objects flare due to activity, monitoring the situation within minutes.

Cenko predicts that if the rescue mission is successful, data from Swift will continue to complement existing observatories such as Hubble and the James Webb Space Telescope, as well as future missions such as the Nancy Grace Roman Space Telescope, which address astrophysical questions that are impossible for any telescope to solve.

“Swift is NASA’s all-purpose instrument when it comes to studying the cosmos,” Cenko said. “For the past two decades, Swift has been a key player in NASA’s efforts to understand how the universe works, and we look forward to returning to this work once support is complete.”

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