Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Astronomy

How We Detect Exoplanets Using the Transit Method

Quick fact

The Kepler Space Telescope used the transit method to discover over 2,600 confirmed exoplanets, revolutionizing our understanding of planetary systems.

Why this is interesting

Imagine watching a star that appears to blink regularly — not because it's winking, but because a distant world is passing in front of it, briefly stealing its light.