Why visual size of the Earth is not 3,6 times bigger on some of the Apollo footage videos and photos taken from the Moon surface?

Question

Edit title – 3,6 times bigger than visual of the Moon we see here on the Earth surface?

In: Mathematics

Answer 1

Look at a picture on your phone. Look at that same picture on your computer. Now, look at it full screen on your computer.

It changes sizes. There is no ‘natural size’ for an image. As such, you need to normalize the size of objects in an image. You can do this with a reference object. Let’s say a lego figure held at arm’s reach from the camera. If we have two pictures and want to compare them, we can scale them bigger or smaller until the lego figures appear the same size.

Your brain sort of automatically does this when looking at pictures, but without a reference object, it’s basically impossible to get any real idea of relative sizes.