Is Einstein's "biggest blunder" still considered a mistake?
A) No,the cosmological constant is nonzero.
B) Yes,the cosmological constant turned out to be zero.
C) Somewhat,because he could have predicted that the universe was expanding even before Hubble observed it.
D) Both a and c are correct.

Question

Quizplus · Accepted Answer

Einstein's "biggest blunder" was introducing the cosmological constant to allow for a static universe, but later he removed it when the universe was found to be expanding. However, the cosmological constant is now considered important in explaining dark energy, so it is nonzero. Additionally, if Einstein had not introduced it, he might have predicted the universe's expansion before Hubble.

Is Einstein's "Biggest Blunder" Still Considered a Mistake