The Universe facts
One short astronomy fact per day, each with a figure and a source. Pick a topic or scroll back through the days.
October 2026
- Oct 30 The UniverseBig Bang Light Still Fills the Whole Sky
- Oct 20 The UniverseObservable Universe Spans 92 Billion Light-Years
May 2025
April 2025
- Apr 29 The UniverseAbsolute Zero Is Unreachable
- Apr 8 The UniverseAn Unexplained Radio Source Bursts Toward the Galactic Center
- Apr 1 The UniverseThe Universe Is Missing Most of Its Matter
March 2025
- Mar 24 The UniverseSpace Can Expand Faster Than Light
- Mar 19 The UniverseNeutrinos Pass Through You by the Trillions
- Mar 17 The UniverseThe Speed of Light Isn’t Always the Speed of Light
- Mar 4 The UniverseThere’s a Giant Void in Space with Almost Nothing in It