1971 ⟶ Discovery of Helium-3 Superfluidity

Helium 3 superfluidity

Year

1868

1937

1938

1971

1972

1974

☀️ Discovery of Helium

Astronomers notice a new bright emission line in the spectrum of the Sun's atmosphere during an eclipse. The emission line is caused by an element's giving out light, and British astronomer Norman Lockyer concludes that it is an element unknown on Earth. He calls it helium, from the Greek word for the Sun. Nearly 30 years later, helium is found on Earth.⟶

AstronomyPhysicsHeliumLockyerSpectroscopy19th CenturyElementsSolar System

United Kingdom

🧊 Pyotr Kapitsa, John Allen, and Don Misener produce superfluid helium-4

Pyotr Kapitsa, John Allen and Don Misener produce supercooled helium-4, the first zero-viscosity superfluid, a substance that displays quantum mechanical properties on a macroscopic scale.⟶