Mercury is the closest planet to the sun. It is terrestrial. A year on Mercury is only 88 days long

Venus is the second planet from the sun. It is terrestrial. A day on Venus lasts longer than a year.

Mercury

Venus

Earth

Mars

Doc

Earth is the third closest planet to the sun. It is terrestrial. Earth is the only planet not named after a god.

Mars is the fourth planet from the sun. It is terrestrial. Mars is home to the tallest mountain in the solar system.

The Four Inner Planets