When you look at the moon, your field of vision is the sky and its surroundings.
When you look at a picture of the moon, your field of vision is the picture of the sky and its surroundings, and the surroundings of the picture.
Basically you’d have to have your face close enough to the picture where you’d see ONLY the picture, for the moon to look as impressive as IRL (and I daresay it’d be out of focus).
When you look at the moon, your field of vision is the sky and its surroundings.
When you look at a picture of the moon, your field of vision is the picture of the sky and its surroundings, and the surroundings of the picture.
Basically you’d have to have your face close enough to the picture where you’d see ONLY the picture, for the moon to look as impressive as IRL (and I daresay it’d be out of focus).