You think summer on Earth is hot? Well, think about the planets that are even closer to the Sun than us! Speaking of - which planet is closest to the sun?
Answer Mercury
Mercury is the closest planet to the sun followed by Venus and Earth. Amazingly, it's only the second hottest planet in the solar system due to its lacking atmosphere!
Asked by Rachel Bortles · Last updated 5 years ago · 102.8K views · SOURCE