What are the characteristics of the planets and stars in the solar system

What are the characteristics of the planets and stars in the solar system

1. Mercury is closest to the sun, is the smallest planet in the solar system. Mercury is smaller than Ganymede and Titan in diameter, but it is heavier. 2. Venus is the second closest to the sun, the sixth largest planet in the solar system. Among all the planets, the orbit of Venus is the closest to the circle, the deviation is less than 1%