science.nasa.gov/missions/lisa/nasa-advances-lisa-mission-contributions-with-new-test-telescope NASA Advances LISA Mission Contributions With New Test Telescope
NASA just moved closer to flying a telescope built entirely of glass, designed to catch gravitational wave ripples smaller than a helium atom across a 1.6 million-mile satellite array. The new Engineering Test Unit is the last pre-flight version before hardware heads to ESA for a mid-2030s launch.
— via NASA Breaking News