NASA Progresses Toward LISA Mission with New Telescope Prototype

• NASA has commissioned L3Harris Technologies to develop an 'Engineering Test Unit' telescope for the future LISA (Laser Interferometer Space Antenna) mission.
• This project represents the final stage of development before the production of official flight-ready hardware.
• The mission is led by the European Space Agency (ESA) and is scheduled for launch in the mid-2030s.

Mission Objectives

• LISA will consist of three satellites forming a triangular array spanning 1.6 million miles (2.5 million kilometers) in an Earth-following orbit.
• The spacecraft will use infrared laser beams to measure minute changes in their relative distances caused by passing gravitational waves.
• The detection capability is extremely sensitive, capable of measuring distance changes smaller than the width of a helium atom.

Technical Details

• The telescope design is made entirely of Zerodur, an amber-colored ceramic-glass composite chosen for its ability to maintain its shape across varying temperature ranges.
• The telescope mirrors are coated with gold to optimize performance.
• LISA will detect low-frequency gravitational waves, including those generated by massive black hole mergers and compact objects like white dwarfs and neutron stars.

Collaborative Efforts

• NASA’s involvement includes providing the telescopes, laser systems, charge management devices for proof masses, and scientific data analysis.
• The project builds on the success of the 2016 LISA Pathfinder mission, which demonstrated the feasibility of reducing non-gravitational noise on internal proof masses.