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.