The dominating form of energy in the cosmos, dark energy is driving the accelerating expansion of the universe, but its nature remains a complete mystery.

What we saw in the DESI experiments, and now strengthened by our South Pole Telescope observations, is that dark energy is becoming weaker with time, or time-evolving. Dark energy's acceleration of ...

For generations, humans have gazed at the stars and wondered about the ultimate fate of the universe. Will it expand forever ...

The 3D cosmic map building DESI has provided more clues that dark energy is weakening over time, suggesting our best model of cosmic evolution could be wrong. Skip to main content.

He's a member of the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX), is studying dark energy from an earlier time in the universe's existence than DESI.HETDEX is also focused on sound ...

Dark energy is the name physicists have given to the mysterious thing driving the universe's accelerated expansion. It may be a force or a form of energy, and one piece of evidence suggests it is ...

Since the discovery of dark energy in 1998, the value of its equation of state has been a fundamental question. This state describes the ratio of pressure over energy density for a substance.

Dark energy shows up in the mathematics of the universe as Einstein’s cosmological constant, but that doesn’t explain what physically causes the universe’s expansion to speed up.

If dark energy is constant, the universe will continue to expand, forever getting colder and emptier. If it's growing in strength, the universe will expand so speedily that it'll destroy itself in ...

“Dark energy” is a term scientists use to refer to whatever is causing the universe to expand faster over time. We don’t know exactly what dark energy is—no one has ever directly seen or measured ...