grandeur of Borobudur is not only demonstrate the ability of design and construction of the Indonesian nation ancestors are amazing. Placement of overlay or stupa Borobudur reliefs on the walls turned out to show their mastery of astronomy astronomy alias.

Research conducted for 2.5 years Arkeoastronomi Team Borobudur, Bandung Institute of Technology, shows, the main stupa of the world's largest Buddhist temple that serves as Gnomon (timing device) which utilizes sunlight shadow. The main stupa is the largest stupa is located in the center of the temple at level 10 (highest).

The main stupa stupa surrounded overlay 72 that form a circle path in level 7, 8, and 9. The third basic form of that level plus the level 10 is circular, not square the same side as the basic form at level 1 to level 6.

Total stupa overlay on level 7, 8, and 9 respectively are 32 stupas, 24 stupas, and 16 stupas. Distance antarstupa known not exactly the same. Setting the number and spacing antarstupa allegedly has the purpose or particular meaning.

"The fall of the shadow of the main stupa stupa on top of a particular overlay to a certain extent indicates the beginning of the season or a particular prey according Pránatamangsa (Java system to calculate the season)," said Chairman Tim Irma Indriana Hariawang Arkeoastronomi ITB on Wednesday (18/05/2011).

The team consists of one teacher and four students of Astronomy ITB, the ITB Mathematics student, and a researcher with the National Aeronautics and Space Institute. Their findings are published in the proceedings of the 7th International Conference on Oriental Astronomy in Tokyo, Japan, in September