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Astronomers Use Light Echos to Measure the Distance to a Star - Universe Today
Because stars are just points of light in the sky, it’s very difficult to know how far away they are. Astronomers use several techniques to measure distance, but they’ve got a new one now. By measuring echos of light bouncing off a distant nebula, researchers have fine-tuned their accuracy to an amazing level of … Continue reading "Astronomers Use Light Echos to Measure the Distance to a Star"