i want to adress the fact that you do not think anyone has evertaken a picture of a spherical earth, but I can't put links in things because im typing this on a playstation vita, otherwise known as trash, but go to google and search "round earth" and most of what you was taken by telecopes that humans have sent into space, such as the Hubble telescope which has been very useful in ourunderstanding of space and of the knowledge of the topography of our earth.