Saturday, February 01, 2020

Frame Dragging

 

Well, Einstein's right again. Massive objects warp space-time, something never actually seen until now.

One of the predictions of Einstein's general theory of relativity is that any spinning body drags the very fabric of space-time in its vicinity around with it. This is known as "frame-dragging".

In everyday life, frame-dragging is both undetectable and inconsequential, as the effect is so ridiculously tiny. Detecting the frame-dragging caused by the entire Earth's spin requires satellites such as the US$750 million Gravity Probe B, and the detection of angular changes in gyroscopes equivalent to just one degree every 100,000 years or so.

Luckily for us, the Universe contains many naturally occurring gravitational laboratories where physicists can observe Einstein's predictions at work in exquisite detail.

Our team's research, published today in Science, reveals evidence of frame-dragging on a much more noticeable scale, using a radio telescope and a unique pair of compact stars whizzing around each other at dizzying speeds.

The motion of these stars would have perplexed astronomers in Newton's time, as they clearly move in a warped space-time, and require Einstein's general theory of relativity to explain their trajectories.



Frame Dragging explained.



Science never disappoints when done right. :)

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