Lives of Stars

Fusion, giants and remnants

An interactive lesson with 6 steps, about 5 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Stars fuse hydrogen into helium. The 0.7% of mass lost becomes energy.
• Massive stars burn hotter and die younger.
• Sun-like stars end as white dwarfs. Massive stars explode as supernovae, leaving neutron stars or black holes.

Steps

1. Big burns fast
2. How stars shine
3. How stars die
4. The Sun’s fate
5. Live fast, die young
6. Mass into energy