Matter & Energy

Topic Image Rail

gamma ray map

BRIGHT SKY  A map of two-thirds of the sky shows bright spots where high energy gamma rays originate, including in the Milky Way (left) as well as nearby galaxies, such as Markarian 421 and Markarian 501. (Constellations are superimposed for orientation.)

heat engines

Heat engines, big and small, turn heat into mechanical work. The steam engine (left) pushes a piston that turns a wheel. A pint-sized version (right) sets an atom in motion to perform work.

someone playing the Quantum Moves game

QUANTUM GAMERS  Human intuition has spawned new strategies for quantum computation, thanks to a video game.

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