A pint-sized gun that shoots a spray of molten metal is saving U.S. wartime industry hundreds of thousands of dollars and hours of labor. The Army & Navy have 750 of these hot-metal guns in use this ...
A plasma ejection during a solar flare. (Courtesy: NASA/SDO and the AIA, EVE, and HMI science teams) The centre of the Sun is incredibly hot, at 15 million degrees Celsius. Its surface is much cooler, ...
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