Gravitational lens gives us a third estimate of the Universe’s expansion

Lensed images of a supernova appear at different times.

https://arstechnica.com/science/2023/05/gravitational-lens-gives-us-a-third-estimate-of-the-universes-expansion/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social