Earth and Moon being a spherical object, when we stand on the surface of it, we would have to see up in order to see an object that is perpendicularly opposite to it.

But further depending on where you are exactly on earth would determine if you can see it exactly above you or at some angle above you.

Just like if we need to send a shuttle to moon, it would be thrown in upwards direction, similarly we need to see in an upwards direction to see a spherical item when we are ourselves standing on a spherical object.