Venus, with almost the same size as that of the Earth, is visible through naked eye. Man has been seeing it since time immemorial but the ancients believed it two be two different stars as it rose with the sun and also set in the evening with the sun, being closest to it. Pythagoras was the first person to find that it was a single star. Pythagoras however thought that that it revolved round the Earth. He was corrected later by Copernicus who showed Sun to be the center of the Solar system and Venus as a planet. His findings were confirmed by Galileo, who, in 1610, with his telescope found that Venus was a planet which orbited around the Sun.