Astronomy references to 108

The earth cycle is supposed to be of 2160 years = 20 x 108. The distance between the Earth and Sun is 108 times the diameter of the Sun. The diameter of the Sun is 108 times the diameter of the Earth. The distance between the Earth and Moon is 108 times the diameter of the Moon. The universe is made up of 108 elements according to ancient texts. The current periodic table claims a few more than 108.
There are 12 constellation and 9 arc segments. 9 times 12 equal 108. The 9 planets travelling through the 12 signs constitute the whole of existence. 9 x 12 = 108. The 27 nakshatras or lunar constellations spread over the 4 elements – fire, earth, air, water or the 4 directions – north, south, east, and west. This also constitutes the whole of existence. 27 x 4 = 108.