PBS Space Time - S2026E04: The Universe Is Racing Apart. We May Finally Know Why.
We've known that the universe is expanding since 1929, and that its expansion is accelerating since 1998. The culprit behind the acceleration is unknown, so we live with a stand-in term "dark energy". Our modern cosmological model assumes that dark energy has a constant density--always the same amount of the outward-shoving stuff per volume. But there's recent evidence to the contrary--which may be why our primary efforts to measure the expansion rate of the universe disagree with each other.
Cast: Matthew O’Dowd
All Episodes - Season 2026
PBS Space Time S2026E04 Synopsis
Stream PBS Space Time "The Universe Is Racing Apart. We May Finally Know Why." in HD quality on Goojara. Originally aired on 2026-02-19, this episode is part of Season 2026 of PBS Space Time. Featuring performances from Matthew O’Dowd among the cast. With a runtime of 21m, the episode keeps you engaged throughout. As part of this Documentary and Talk series, the episode continues to build on the show's compelling narrative. We've known that the universe is expanding since 1929, and that its expansion is accelerating since 1998. The culprit behind the acceleration is unknown, so we live with a stand-in term "dark energy". Our modern cosmological model assumes that dark e...
