8-962s20.jpg
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8-962s20.jpg
Alt text:
Sun, Earth, Jupiter, and Saturn surrounded by blue circles and lines, plus space probe and radio signals.
Caption:
High-precision test of general relativity by the Cassini space probe (artist’s impression): radio signals sent between the Earth and the probe (green wave) are delayed by the warping of spacetime (blue lines) due to the Sun’s mass. (This image is in the public domain. Courtesy of NASA.)
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