Many Adults Can’t Pass This Elementary School-Level Quiz, Can You?! Corey Moylan|General Knowledge|14 Aug 2024 Which of these planets is closest to the sun? 45% Retry Correct Incorrect Mercury is closest, at 35.98 million miles from the sun. Next NASA via Getty Images NASA via Getty Images Which of these planets is closest to the sun? Mercury Jupiter Neptune Earth 45% Scroll down to continue on! Next