Nature of dark energy
What is driving the accelerating expansion of the universe?
Summary
The expansion of the universe is speeding up, and there is no established physical explanation for why.
Source
Open, as listed by Wikipedia · Unsolved problems in physics. Checked 29 Sep 2026.
The status is the source’s. Papex does not decide whether a problem is solved.
Records on this problem
No public record addresses this problem yet.
