• davidgro@lemmy.worldEnglish
      4·
      1 年前

      Changes in the gravitational field definitely travel, and do so at the speed of light.

      Look up LIGO

      • cuerdo@lemmy.worldEnglish
        12·
        1 年前

        If the mass vanishes, then the gravity would also vanish, at the same time.

        • chuckleslord@lemmy.worldEnglish
          4·
          1 年前

          False. If the mass vanished via magic, the effect would ripple out at the speed of light. Source, gravity waves which move at the speed of light.

        • cuerdo@lemmy.worldEnglish
          1·
          1 年前

          But vanishing is magic, it goes against the laws of physics, so you could apply any fictional logic