If you walk 3 meters N and then turn and walk 2 meters S, what is your displacement?

the largest known star in the universe is uy scuti, a hypergiant with a radius around 1,700 times larger than the

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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the maxium height is 34m/s