Some people thought that the universe would recollapse in the future. Einstein was fond of this idea. But if there's dark energy, and the dark energy does not go away, the universe is just going to keep expanding forever and ever and ever.
Algunos pensaban que en el futuro volvería a colapsar. Einstein creía eso. Pero si existe la energía oscura y ésta no desaparece, el Universo continuará expandiéndose eternamente.