3 min learnJul 3, 2026 09:05 PM IST
Nasa has efficiently launched a first-of-its-kind rescue mission geared toward extending the lifetime of one in every of its longest-serving house observatories. The mission despatched a privately constructed spacecraft into orbit to rendezvous with the ageing Neil Gehrels Swift Observatory, which is regularly shedding altitude and faces eventual destruction as atmospheric drag pulls it again towards Earth.
The mission additionally marked the ultimate flight of Northrop Grumman’s Pegasus XL rocket, bringing an finish to a launch car that has served the house trade for greater than three a long time.
LINK spacecraft begins historic servicing mission
The Swift Increase mission lifted off on Friday (July 3) at 4.36 am EDT (2.06 pm IST), with the LINK servicing spacecraft developed by Arizona-based Katalyst House Applied sciences.
As a substitute of launching from a standard pad, the Pegasus XL rocket was launched mid-air from Northrop Grumman’s L-1011 Stargazer plane over the Marshall Islands earlier than igniting its engines and carrying LINK into orbit.
The launch adopted earlier delays brought on by poor climate and a software program problem affecting the rocket’s navigation system.
Why Swift wants rescuing
Launched in November 2004, the Swift Observatory was designed to check gamma-ray bursts and different high-energy cosmic occasions. Greater than 20 years later, the telescope continues to ship precious scientific observations.
Nevertheless, elevated photo voltaic exercise has intensified atmospheric drag in low Earth orbit, inflicting Swift’s orbit to regularly decay. Not like many more recent spacecraft, Swift was not designed with propulsion programs able to elevating its personal orbit, leaving it weak to eventual re-entry.
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Somewhat than retiring the observatory, Nasa opted to exhibit a brand new satellite tv for pc servicing functionality that might lengthen the lifespan of precious house belongings at a fraction of the alternative price.
Robotic seize and orbital increase
Over the approaching weeks, LINK will regularly strategy Swift whereas observing the spacecraft to find out the most secure location for seize.
The servicing spacecraft is provided with three robotic arms that can safe the observatory earlier than utilizing ion thrusters to slowly elevate each spacecraft again to a extra steady orbit over a number of months.
Nasa goals to return Swift to an altitude of roughly 600 kilometres, doubtlessly including a number of extra years to its operational life, supplied its onboard programs stay wholesome.
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The mission additionally represents the primary try by a non-public spacecraft to seize and repair an uncrewed US authorities satellite tv for pc.
Pegasus retires after historic profession
The mission marked the forty fifth and last flight of the Pegasus XL rocket, which first flew in 1990.
Recognized for its distinctive air-launch system, Pegasus might attain orbital inclinations which are troublesome to entry from conventional launch websites. That flexibility made it well-suited for the Swift rescue mission, which required reaching the telescope’s comparatively low orbital inclination.
Nasa awarded the Swift rescue mission to Katalyst House Applied sciences in 2025, giving the corporate lower than a yr to design, construct, and take a look at the LINK spacecraft. The whole mission, together with launch, price Nasa roughly $30 million, considerably lower than constructing and launching a alternative house observatory.