After the sun and the moon, Venus is the third brightest body in our sky, and because of this it received lots of attention from all the great ancient civilizations, including the Mayans, the Egyptians, and the Greeks.
As early as 1600 B.C. the Babylonians kept detailed records of its movement across the sky.
But in modern times our nearest neighbor has been somewhat neglected and only three missions have been dedicated to studying the heavily clouded planet. As a result, there is still a lot astronomers don't know about Venus.
