ET mourns the loss of Rai Weiss.

With deep sadness, the Einstein Telescope Collaboration acknowledges the passing of Rainer Weiss. The longtime MIT professor shared a Nobel Prize for his role in developing the LIGO observatory and detecting gravitational waves. As both a scientist and a mentor, he profoundly influenced many of us. His legacy will continue to guide and inspire us.

We extend our heartfelt condolences to Rai´s family, friends, and the wider community. In recent years, Rai made important contributions to the development of the Einstein Telescope vacuum pipe technology, once again proposing innovative and ambitious ideas that exemplified his spirit.

https://news.mit.edu/2025/professor-emeritus-rainer-weiss-dies-0826