#dark energy

Content tagged "dark energy".

2 items (2 articles, 0 stories)

95% of the Universe Is a Mystery — The Puzzle of Dark Matter and Dark Energy

April 21, 2026

Stars, galaxies, gas — everything we can observe makes up just 5% of the universe. The other 95% is something we can't see. Dark matter and dark energy sit at the heart of modern cosmology, and we still don't know what either of them is.

Cosmic Mysteries #dark matter#dark energy#cosmic mysteries#galaxies#gravitational lensing

The Universe Can't Agree on Its Own Expansion Rate — The Hubble Tension Explained

April 13, 2026

Two different methods for measuring how fast the universe is expanding keep giving different answers. A landmark April 2026 measurement has now ruled out measurement error as the explanation — and what's left is genuinely unsettling.

Cosmic Mysteries #Hubble constant#cosmic expansion#dark energy#cosmic microwave background#supernovae