Cosmic Exploration · discovery

Cosmic Rays

1912 · Victor Hess

Year
1912

Description

Radiation was assumed to come from the ground, so it should fall with altitude. Hess took an electroscope to 5,300 m in a balloon and found it rising instead.

Discoverer

Referenced by

researcher

Open on the Cosmic Exploration shelf — the interactive card, the filters, and everything alongside it.

From the Discoveries database in Notion, last edited 2026-08-15. This page is the row, rendered by the build; nothing on it is written by hand.