Level 1 — Absolute Beginner
NASA has a space telescope called Swift. It is getting too close to Earth and could fall down.
A new robot spacecraft will fly up to save it. The robot is called LINK. It has three arms to hold the telescope.
LINK will grab Swift and push it to a safer place in space. This is the first time a private robot will catch a government satellite.
- NASA
- the space agency of the United States
- telescope
- a tool used to see faraway objects in space
- space
- the area beyond Earth where the stars and planets are
- robot
- a machine that can do tasks on its own
- spacecraft
- a vehicle that travels in space
- arm
- a long part used to reach and hold things
- grab
- to take hold of something
- satellite
- an object that moves around Earth in space
Level 2 — Elementary
NASA has launched a special mission to save one of its space telescopes. The Neil Gehrels Swift Observatory has been slowly falling toward Earth, and without help it would burn up in the atmosphere by October 2026.
A robotic spacecraft called LINK, built by a company named Katalyst Space Technologies, will fly up to meet Swift. LINK is about 1.5 meters tall and has three robotic arms to grab the telescope, which is nearly 4 meters long.
LINK rode into space on a Pegasus XL rocket, which was making its very last flight. The rocket was carried up by an airplane and released high in the sky before firing its engines.
- mission
- an important task or journey with a clear goal
- observatory
- a place or instrument used to watch and study space
- atmosphere
- the layer of gases surrounding Earth
- burn up
- to be destroyed by heat, as when an object falls through the atmosphere
- robotic
- controlled by or working like a robot
- launch
- to send a spacecraft or rocket into the sky
- rocket
- a vehicle that is pushed into space by burning fuel
- release
- to let something go free
Level 3 — Intermediate
NASA has begun a first-of-its-kind rescue mission to save the Neil Gehrels Swift Observatory, a veteran space telescope whose orbit has been decaying toward a point of no return. Without intervention, atmospheric drag would force the observatory to re-enter and burn up by October 2026.
The savior is a robotic servicing spacecraft called LINK, built by Arizona-based Katalyst Space Technologies. Standing about 1.5 meters tall and equipped with three robotic arms, LINK is designed to grapple the roughly 4-meter Swift, then fire gentle ion thrusters to slowly raise the pair's orbit over the coming months.
LINK launched aboard a Pegasus XL rocket in what was the final flight of that storied launch vehicle. The rocket was carried aloft by a Stargazer aircraft and released at around 12,000 meters before igniting. If successful, LINK will become the first private spacecraft to capture an uncrewed United States government satellite, a milestone for the emerging field of in-orbit servicing.
- veteran
- having long experience or service
- decaying
- gradually getting lower or weaker; here, an orbit slowly dropping
- intervention
- the act of stepping in to change or help a situation
- servicing
- the act of repairing or maintaining equipment
- grapple
- to grip or seize firmly, often with a mechanical device
- ion thruster
- an engine that produces gentle push by shooting out charged particles
- launch vehicle
- a rocket used to carry a payload into space
- milestone
- an important point or achievement in a process
Level 4 — Advanced
NASA has embarked on an unprecedented salvage operation to preserve the Neil Gehrels Swift Observatory, a long-serving space telescope whose orbit has been inexorably decaying toward an altitude from which recovery would be impossible. Absent intervention, escalating atmospheric drag would drive the spacecraft to a destructive re-entry by October 2026, ending a mission that has spent years surveying gamma-ray bursts and other transient cosmic phenomena.
The instrument of rescue is LINK, a compact robotic servicer developed by Arizona-based Katalyst Space Technologies. Measuring roughly 1.5 meters in height and outfitted with three articulated arms, LINK is engineered to rendezvous with and grapple the approximately 4-meter observatory before deploying gentle ion propulsion to incrementally boost the conjoined pair to a stable orbit over a span of months. The delicacy of the maneuver, capturing a satellite never designed to be serviced, exemplifies the technical ambitions of the nascent in-orbit servicing industry.
LINK ascended aboard a Pegasus XL, the air-launched rocket making its valedictory flight after decades of service. Slung beneath the Stargazer carrier aircraft and released at approximately 12,000 meters before ignition, the vehicle bowed out on a mission of unusual symbolic weight. Should LINK succeed, it will register as the first private spacecraft to capture an uncrewed United States government satellite, a proof of concept that could reshape how agencies extend the lives of costly orbital assets.
- salvage
- the act of saving something from loss or destruction
- inexorably
- in a way that cannot be stopped or prevented
- transient
- lasting only a short time; temporary
- articulated
- having joints that allow movement and bending
- rendezvous
- a planned meeting, here between two spacecraft
- nascent
- just beginning to develop; in an early stage
- valedictory
- serving as a farewell; marking a final appearance
- proof of concept
- evidence that an idea or method can work in practice
