Some years ago, a chart marked with more than 600 stars and 34 constellations was discovered there. Japanese scholars admitted that it was the same with the constellation above Pyongyang.

At that time, the people of Koguryo Kingdom (B.C. 277-A.D. 668) achieved a big success in astronomy research. It is well illustrated in tomb murals dating back to Koguryo Kingdom, which picture asterism, including the Great Bear.

Asterism drawn on the ceiling of Kitora tomb is the one seen from Korea at 39 degrees north latitude, not from Japan or China. Pyongyang, which was the capital city of Koguryo, is located at the 39 degrees north latitude.

A Japanese space archaeologist confirmed the location of the constellation with planisphere of Chonsangryolchabunyajido (astronomical chart) of Medieval Korea.

The chart was mapped out in 1395 on the basis of astronomical chart carved on a stone in Koguryo period. The stone chart pictures 1 467 stars in 282 constellations in a circle, which could be viewed in Pyongyang at that time.

Thus, Koreans made a big contribution to the development of science in the East including Japan.