The Sun as a dark sphere ringed with glowing loops, with a bright white-blue flare near its centre. — An M6.5-class solar flare on 11 April 2013, in extreme ultraviolet light (false colour). NASA's Solar Dynamics Observatory.
Image: NASA/SDO, M6.5-class solar flare, 11 April 2013 (131 and 171 ångström) · Public domain

A Knaph story

The Story of Energy

How people found the one thing that is never used up, and why

1644 – 1956

From a quarrel over how to count motion to a particle nobody could see: the experiments, the arguments and the law that says what is added up never changes.

A Knaph story

The Story of Energy

How people found the one thing that is never used up, and why

1644 – 1956

From a quarrel over how to count motion to a particle nobody could see: the experiments, the arguments and the law that says what is added up never changes.