4. Mercury is covered with craters .Mercury’s biggest craters are4 billion years old
5. Venus is the hottest planet in theSolar-system. It has no moon
6. Earth is the only planet with water.It has 1 moon
7. This is the Moon. It spins around theEarth. It takes 28 days to spin around the Earth. Neil Armstrong (1969) Left to right: Armstrong, Collins, Aldrin