Holiday in Puno – Puno Travel for Mercury and Venus. Inner planets. Planets inside the asteroid belt, namely Mercury, Venus, Earth, and Mars. Inner solar system. The region of the solar system up to and including the asteroid belt, incorporating the Sun, Mercury, Venus, Earth, Mars, the asteroid belt, and Ceres. Intercalary month. A leap lunar month inserted into a lunar calendar to calibrate it with the solar calendar. Holiday in Puno – Puno Travel 2016.