NASA has initiated a rescue mission for the aging Neil Gehrels Swift Observatory, a robotic effort to prevent the telescope from vanishing into dust. The mission involves a robotic spacecraft named LINK designed to latch onto the telescope and tow it to a higher, stable orbit. If successful, the operation could pave the way for giving other satellites a second life.
Why is NASA attempting to rescue the Swift telescope?
Launched in 2004, the Swift telescope was built for a two-year mission to study gamma-ray bursts, which NASA astrophysicist Regina Caputo describes as “the most energetic things that happen in the universe.” Because the telescope lacks its own propulsion system, it has gradually lost altitude due to atmospheric drag. According to Shawn Domagal-Goldman, the director of Nasa’s astrophysics division, the agency decided to intervene because of the telescope’s unique scientific value and the high demand for its rapid response capabilities.
The Swift telescope was originally designed for a two-year lifespan.
How will the robotic rescue mission function?
The rescue mission relies on a robotic spacecraft developed by the US startup Katalyst. The robot, LINK, is scheduled to launch aboard a small rocket named Pegasus, which is released from a jet rather than a traditional launch pad. Once in orbit, the robot must locate the Swift telescope, maneuver around it, and latch on using three movable arms. According to NASA, the objective is to tow the telescope approximately 300 kilometres higher, an effort expected to last at least one month. Regina Caputo noted that the mission faces significant technical unknowns, including a lack of clear visual data regarding the back of the telescope where the robot must connect. She estimated the probability of success at “maybe 50-50.”
What are the long-term implications for satellite management?
The Swift rescue mission has a projected cost of $30 million—compared to the original $250m cost of the telescope. Robert Lamontagne, a vice president at Katalyst, stated that the mission could represent the “start of a new model” to “refuel, reposition, repurpose, repair, and even upgrade satellites, even if they were never prepared for it.”
Pro Tip: The Economics of Space Maintenance
Before launching a rescue mission, agencies weigh the cost of the repair against the cost of a replacement.
Frequently Asked Questions
Why did NASA postpone the initial launch?
NASA postponed the launch of the rescue mission due to unfavourable weather conditions at the Pacific Ocean atoll site. The agency rescheduled the attempt for no earlier than Wednesday, July 1.
What happens if the rescue mission fails?
If the mission fails, the Swift observatory is expected to soon burn up in the atmosphere.
Is this the first time a satellite has been repaired in space?
According to Shawn Domagal-Goldman, the mission involves “a lot of firsts stacked on top of each other.”
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