Science
Black Holes & Dark Matter Quiz
The universe's deepest mysteries — from event horizons to invisible matter
The universe's deepest mysteries — from event horizons to invisible matter
Only about 5% of the universe is ordinary matter — the rest is dark matter (27%) and dark energy (68%).
Each round presents 10 randomized multiple-choice questions drawn from a pool of 50, so every playthrough is different. You get instant feedback with explanations after each answer, plus a shareable score at the end.
Explore the universe's most mysterious phenomena, from stellar black holes to the supermassive Sagittarius A* at our galaxy's center. Cover the Event Horizon Telescope's historic first image, Hawking radiation, the information paradox, Fritz Zwicky and Vera Rubin's dark matter discoveries, and the accelerating expansion driven by dark energy.
Dark matter is invisible matter that exerts gravitational pull, holding galaxies together. Dark energy is a mysterious force driving the accelerating expansion of the universe. Together they make up about 95% of the universe.
The Event Horizon Telescope (EHT), a network of eight radio telescopes spanning the globe, captured the first image of a black hole in galaxy M87 in April 2019, showing the shadow of the event horizon surrounded by glowing gas.
For a stellar-mass black hole, tidal forces would stretch you in a process called 'spaghettification.' For supermassive black holes, you could cross the event horizon without immediate harm, but could never escape. Time would slow dramatically from an outside observer's perspective.
Last updated: April 2026