CERN scientists simplify space-time in 3 short videos

In this first lesson, Andrew Pontzen and Tom Whyntie go through the basics of space and time individually, using a flip book to illustrate how we can begin to look at them together.

Light always travels at a speed of 299,792,458 meters per second. But if you’re in motion too, you’re going to perceive it as traveling even faster — which isn’t possible! In this second installment, our hosts use a space-time diagram to analyze the sometimes baffling motion of light.

In this third and final lesson, Pontzen and Whyntie explore what gravity means for space-time — or rather, what space-time means for gravity.


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