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Atoms & Forces

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A bright white core of a dead star distorts the light of the sunlike star it orbits, as seen here in an artist’s illustration. It’s the first strong evidence for this gravitational lensing in a binary star system.

Astronauts aboard the International Space Station toast people back home with water recycled from their urine. A new system not only would turn pee into drinking water but also produce energy.

Not your grandfather clock, even if it is ceiling height. This is NIST-F2, the world’s most accurate atomic clock. It’s lead designer, Steven Jefferts, is at right, with colleague Tom Heavner looking on. 

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