Which planet is closest to the sun?

Mercury is the planet closest to the sun in our solar system. This proximity results in Mercury having the shortest orbital period of any planet, completing a full orbit around the sun in just about 88 Earth days. Its position means it experiences extreme temperature variations, with very high temperatures during the day and very low temperatures at night. Mercury's surface features many craters, indicating that it does not have a significant atmosphere to shield it from meteoroid impacts, which is common in planets closer to the sun that have less atmosphere. This fundamental knowledge about the arrangement of planets in relation to the sun is essential for understanding the dynamics of our solar system.