Moon on the wall
This device reflects the moon on the wall. We can see the phases of the moon, from full moon to new moon in one hour.
(BANPREST/ Amazon.co.jp: Approx. $29.40)
RelInfo: asahi.com: Crater on the surface of the moon
Old craters which are on the moon or Mars were created by the impact of the asteroids about 4 billion years ago... (from the US magazine "Science", published September 16.
