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The measurement of superluminal motion in a star is done using optical equipment.
Scientists have discovered a bright gamma-ray burst that took place on the day of the week of February 21 – 23rd of December, 2019. The burst, called GRB 221009A, went off 2 billion light-years away in the Sagitta constellation. Scientists believe the creation of the bright pulse occurred when a massive star in the Sagitta…