Science Explain why Mercury's surface temperature varies so much from day to night. Asked by Dr. John Carmen 12 years ago 1/10/2013 7:02 AM Last updated by anonymous 9 years ago 3/23/2016 2:02 PM
Mercury doesn't have an atmosphere that would allow it to hold heat, and it is the closest inner planet to the Sun. So, it is very, very hot at times, and conversely, very, very cold.
