NASA has provided a first glimpse of the full-scale prototype for six telescopes that are set to detect gravitational waves from space. These waves, caused by cosmic events such as black hole collisions, are set to be observed by the LISA (Laser Interferometer Space Antenna) mission. This mission is a collaboration between NASA and the European Space Agency (ESA) and aims to advance our understanding of the universe by using lasers to measure tiny distances between spacecraft.
The LISA Mission and Telescope Design
The LISA mission will feature three spacecraft arranged in a triangular formation, with each side of the array measuring around 1.6 million miles (2.5 million kilometres). These spacecraft will communicate using infrared laser beams, transmitted and received by twin telescopes on each of the craft. NASA is responsible for providing all six of the telescopes for this mission. According to Ryan DeRosa, a researcher at NASA's Goddard Space Flight Center, the prototype telescope, known as the Engineering Development Unit Telescope, is crucial for guiding the construction of the final flight hardware.
Prototype Telescope Inspection and Materials
The prototype arrived at NASA's Goddard Space Flight Center in May and has since undergone inspection. Manufactured by L3Harris Technologies, the telescope is composed of a specialised material called Zerodur, which is a glass-ceramic known for its stability across different temperatures. Its primary mirror is coated with gold, which enhances its ability to reflect infrared lasers and reduces heat loss in the cold environment of space.
Launch Timeline and Future Prospects
The LISA mission is expected to launch in the mid-2030s, marking a significant milestone in space-based gravitational wave detection. This mission will help unlock deeper insights into the forces shaping our universe.
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