A strange radio signal from the center of our galaxy is putting Einstein to the test
Astronomers have detected a unique, repeating radio signal originating from a pulsar orbiting the supermassive black hole at the Milky Way's center, providing a natural laboratory to challenge the limits of general relativity.
The discovery of a pulsar named PSR J1745-2900 marks the first time scientists can precisely track an object orbiting Sagittarius A*, our galaxy's central black hole. Because pulsars emit incredibly stable radio pulses like cosmic clocks, any tiny variation in their timing reveals how gravity warps the surrounding space-time.
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