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Astronomers find star with three super-Earths

Astronomers said Thursday they had found a planetary system with three super-Earths orbiting a bright, dwarf star — one of them likely a volcanic world of molten rock. The four-planet system had been hiding out in the M-shaped, northern hemisphere constellation Cassiopeia, “just” 21 light years from Earth, a team reported in the journal Astronomy & Astrophysics. Super-Earths have a mass higher than Earth’s but are lighter than gas giants like Neptune, Saturn or Jupiter. They can be made of gas, rock, or both.

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The unintended consequences of rationality — By Leah Burrows | Harvard John A. Paulson School of Engineering and Applied Sciences

“The idea of rationality is a shared construct between AI and economics. When we frame questions in AI, we say: what are the objectives, what should be optimized and what do we know about the world we’re in? The AI/economics interface has become quite fertile because there is a shared language of utility, probability, and reasoning about others.”

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