Illustration showing the relative maximum angular sizes of the Solar System bodies. All of the planets, the Moon and the Sun, vary in size on the sky depending on their position relative to the Earth. The Sun and the Moon have almost identical angular sizes of around half a degree. The other bodies, from left to right, are Mercury (26.1 arcseconds), Venus (105.3 arcseconds), Mars (25.6 arcseconds), Jupiter (51.7 arcseconds), Saturn (20 arcseconds), Uranus (4 arcseconds) and Neptune (2.4 arcseconds). Thus Venus and then Jupiter are the celestial bodies with the largest apparent size on the sky after the Moon and the Sun. On the scale of this image, Neptune and Uranus are practically invisible.Of all the celestial bodies shown here, Venus and Mars show the greatest variation in size on the sky, being less than one-sixth of their maximum size when seen at their farthest from the Earth.