Here's a link to an interesting article on the two methods for measuring the expansion rate of the universe. Both methods demonstrably accurate, but giving two different answers. I would like to understand this a little better. Perhaps a topic for future club meeting?
https://bigthink.com/starts-with-a-bang/...RKdxAVHc7g
https://bigthink.com/starts-with-a-bang/...RKdxAVHc7g