When you look at the sky during the night, how do you tell the exact location of the different celestial objects that you see? Similarly, how do scientists determine where the planets are located? A concept called spacetime was implemented by experts.
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Spacetime is a way to describe an object’s location at a specific point in time. Combine the three-dimensional space with time and you have a total of four coordinates. Physicist Mike Evans further explains (and lowkey complains about it) here!
Image credit: BBC