National Astronomical Observatory of Japan

The Solar System Walk

At the Solar System Walk, each planet is introduced with condensing the solar system to one-14 billionth of its actual size.

For example, the distance from the sun to Saturn is actually 1.4 billion km, and it takes 40 thousand year by walk. However, at this exhibit that is reduced to one-14 billionth of the actual size, it is just 100 m. It takes several minutes. If one step measures about 50 cm, this means Saturn is 200 steps away. But, the one step would equal to 7 million km.

Visitors can learn the characteristics of each planet while feeling the distance between the planets at this course.