Nuclear Fusion Ignition
A miniature star on Earth.
Explore this event on the interactive timeline →For the first time in history, scientists at the National Ignition Facility (NIF) achieved "ignition"—a nuclear fusion reaction that produced more energy than the laser energy required to trigger it.
Verified Facts
- Fusion is the exact process that powers the sun. It has been a holy grail of physics since the 1950s, famously mocked as being "always 30 years away."
- The December 2022 experiment delivered 2.05 megajoules of laser energy to a tiny diamond capsule of hydrogen, resulting in 3.15 megajoules of fusion energy output.
- While commercial fusion power plants are still years away, achieving physical ignition proved that limitless, clean energy is a matter of engineering, not impossible physics.