
What is the closest planet to the Sun?
The closest planet to the Sun is Mercury. It is the smallest planet in our solar system and orbits the Sun at an average distance of about 57.91 million kilometers (36 million miles). Mercury has a very thin atmosphere, which means it cannot retain heat, leading to extreme temperature fluctuations. During the day, temperatures can soar to around 430 degrees Celsius (800 degrees Fahrenheit), while at night, they can plummet to about -180 degrees Celsius (-290 degrees Fahrenheit).
Mercury has a rocky surface covered with craters, similar to our Moon, and it has no moons of its own. Its orbit is highly elliptical, causing its distance from the Sun to vary significantly. Despite being the closest planet to the Sun, Mercury is not the hottest; that title goes to Venus due to its thick, heat-trapping atmosphere. Mercury's unique characteristics and proximity to the Sun make it a fascinating subject of study in planetary science.







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