Space World learning pack

Cosmic Mysteries

Explore gravity at its most extreme.

A gentle first journey to the event horizon and the clues that help astronomers find black holes.

Discoveries
1
Facts to explore
3
Recommended ages
5–8
Explore time
2 min

Discovery 01

Black Hole

Where gravity bends light and space

💡 Past a black hole's event horizon, not even light can escape!

A dark black hole shadow surrounded by a curved glowing gold and coral disk.
A scientifically inspired storybook illustration of a black hole.

The event horizon is a boundary around a black hole. Once something passes inside it, escaping would require moving faster than light.

Did you know?

  • Go deeper: A black hole is not a cosmic vacuum cleaner. From far enough away, its gravity acts like the gravity of any other object with the same mass.
  • Advanced: Astronomers find black holes by watching their effects: nearby matter can glow in a hot disk, stars can orbit unseen mass, and gravity can bend background light.