Is about the same size as the Moon. Its mass (weight) is 1/20th that of the Earth. Its diameter is 2/5 that of our planet.

Is the closest planet to the Sun. It is about 58 million kilometers from the Sun.

Makes one complete orbit around the Sun every 87.97 days.

Rotates on its axis very slowly compared to Earth. It completes one rotation in about 58 days and 15 minutes.

Is covered with mountains, craters, ridges and valleys.

Has no satellites.