Big Ideas in Physics - Expansion of the universe

Nobel Prize-winning astrophysicist John Mather illuminates the universe's deepest mysteries. In this episode, we delve into the search for extrater... (2023)

I get this question... a lot. "Since astronomers know that the Universe is expanding, what's it expanding into? What's outside of the Universe?" Th... (2020)

Correction to what I say at 5:26 mins: The supernovae that Permutter & Riess used were not all from the same direction of the sky, but the low-reds... (2022)