Measuring the fabric of spacetime

Space.com has more or measuring spacetime near a black hole. Spacetime is a unique dimension created from the combination of time and space. Space.com also has this related 2004 article on how two highly reflective earth orbiting satellites are being "frame dragged" in spacetime by about two meters every year.

Think of it this way. Picture a heavy spinning bowling ball on stretched elastic fabric. The fabric is space time and the spinning ball, earth. In addition to the mass of the ball distorting the fabric as it moves in orbit, the earth's rotation further distorts the fabric, causing frame drag, which science has now been able to measure.

Gravity is the motion of objects following the distortions in spacetime.

Further tests are underway to more precisely describe the shape of spacetime around Earth.

Wayne

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