Space Fact Generator
Discover random facts about planets, stars, black holes, and more. Filter by category or difficulty, save favorites, and dig into the science behind each one.
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About this tool
The Space Fact Generator pulls from a curated set of facts about planets, moons, stars, black holes, galaxies, nebulae and spaceflight. Filter by category or difficulty, hit "Why is that?" for the science behind a fact, and save the ones you like — everything is stored only in your browser.
Where do these facts come from?
Each fact links to its original source, such as NASA or ESA, in the "Source" line below the fact.
Are my favorites and progress saved?
Yes, they're saved locally in your browser via localStorage. Nothing is sent to a server, and clearing your browser data will remove them.
What does "Surprise Me" do differently?
"Generate a Fact" respects your category, difficulty and mind-blowing filters. "Surprise Me" ignores them and pulls from every fact.