Dark Energy and the Ultimate Fate of the Universe: How Everything Will End

Dark energy is driving the accelerating expansion of the universe, and it will determine how everything—from galaxies to atoms—may ultimately end. In this video, we explore how astronomers discovered cosmic acceleration, what dark energy might be, and the possible fates of the cosmos: heat death, Big Rip, Big Crunch, or vacuum decay. ​ Keywords: dark energy, accelerating universe, cosmic expansion, fate of the universe, heat death, Big Rip, Big Crunch, vacuum decay, cosmology, space documentary.