NASA advances LISA contribution with engineering test telescope
An October 8 update describes the next telescope-development step for ESA’s planned gravitational-wave observatory.
What the record says
NASA says L3Harris will design, assemble and integrate an all-glass Engineering Test Unit telescope for LISA. The test unit builds on a prototype delivered in 2024 and precedes flight hardware. ESA leads the three-spacecraft observatory, with NASA contributing telescopes and other technical and scientific support.
Source details and supporting locations.
Practical next step
Follow NASA and ESA for telescope testing and mission milestones.
Limits and what is not established
The engineering unit is not deployed flight hardware. LISA’s launch remains planned for the mid 2030 s, and this development does not mean it is already observing gravitational waves.
Sources checked October 12, 2026. Later notices may change instructions or arrangements.