Einstein’s biggest “mistake” came back — and changed cosmology forever

Einstein’s abandoned cosmological constant made a spectacular comeback when astronomers discovered that the universe’s expansion is accelerating. It now sits at the heart of our best cosmological model—a model that works extraordinarily well, yet may still be wrong.

  Updates   Aug 18, 2026   0   8  Add to Reading List
Einstein’s biggest “mistake” came back — and changed cosmology forever


















Einstein’s abandoned cosmological constant made a spectacular comeback when astronomers discovered that the universe’s expansion is accelerating. It now sits at the heart of our best cosmological model—a model that works extraordinarily well, yet may still be wrong.
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