Astrophysicist Explains Gravity in 5 Levels of Difficulty

[Retro]

How nerdy are you? You're least nerdy if you can only manage level 1 or not even that, up to proper egghead nerdy for level 5.

@PhysicsGuy and @Philistine, this one is especially for you. Let us know how far you get!

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[Philistine]

I understand pretty much all that they are talking about, but they are you talking about it all in quite hand wavey accessible terms. Getting down and dirty with the maths would be a different matter altogether.

 

[Retro]

I'm great with ideas and concepts, but can never handle the maths, unfortunately.