Wait wait! Do not rush to answer until you see this video. People used to believe that the Earth was flat, but not through the whole history.
Today we have the modern equipment, let alone the fact that we humans saw Earth from the moon...
Nevertheless, there are (indeed) people who think that the Earth is flat and that all that circular bull is nothing but a global hoax... (OMG)
BUT!!! Here is one image to put you into thinking:
V stands for velocity and C is the speed of light, if you know what I mean. Now watch the following which has good historical facts and nutrients for the brain!