Venus is the next closest planet to the Sun at 108,200,000 km. It is 12,103.6 km in diameter and it's mass 4.869e24 kg. Venus is a beautiful, bright orange color. It is the third brightest object in the sky, aside from the Sun and the Moon. Venus is known as Earth’s “sister” planet they have similar atmospheres. 1 day on Venus is 243 Earth Days!