科学与环境

Quantum sensor could measure how Earth drags spacetime

来源: Phys.org - latest science and technology news stories · 发布于

Quantum sensor could measure how Earth drags spacetime
来源: Phys.org - latest science and technology news stories

Einstein's theory of general relativity describes gravity as the bending of spacetime, a mathematical model that combines three-dimensional space and time into a single, four-dimensional continuum. The theory also predicts that a rotating object, such as Earth, slightly drags the

Einstein's theory of general relativity describes gravity as the bending of spacetime, a mathematical model that combines three-dimensional space and time into a single, four-dimensional continuum. The theory also predicts that a rotating object, such as Earth, slightly drags the surrounding spacetime as it rotates, a phenomenon known as frame-dragging.

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NASA spots a giant patch of Moon-like rock on Earth
科学与环境

NASA spots a giant patch of Moon-like rock on Earth

An astronaut aboard the International Space Station photographed a remarkable formation in Madagascar that looks surprisingly similar to the Moon’s bright highlands. Made of anorthosite, a rock abundant on the lunar surface, the formation dates back at least 600 million years and

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