In a year, the Sun has 216000 phases in all. It remains southward and northwards for a period of six months alternatively. Thus, it has two kinds of movements in a year. To find out the number of phases, the Sun can have total number of its phases i.e. 216000 is divided by 2.
216000/2= 108000
Thus in one kind of motion, the Sun has 108000 phases. Removing all the trailing zeroes from this number, we find 108. This number has great religious as well as astrological significance. Hence use of rosary with 108 beads is mandatory.
Entire path of the constellations is spread in all the four directions. There are 27 different constellations that according to astrology mostly influence human life. Our sages multiplied this number of constellations (27) by four and fixed the resultant number (108) as the required number of beads in a rosary. Thus with 108 beads, a rosary depicts the entire path of 27 constellations and all the four directions. Apart from it, each constellation has four segments. Thus, all the 27 constellations have 108 segments in all. This combination is also reflected in 108 beads of a rosary.
According to another hypothesis, a human being breathes 21600 times in an Ahoratra (day and night taken together).
SHAT SHATAANI DIVAARAATRAU SAHASTRAANYEK VINSHATIH |
AITATSANKHYAATMAKAM MANTRAM JEEVO JAPATI SARVADAA ||
Thus half period of an Ahoratra is passed in activities like sleeping, eating, bathing and all other mundane tasks. Another half of an Ahoratra comprising of 10800 breaths must be reserved for reciting God's name. Scriptures also dictate that not even a single breath ought to go waste in our life. Hence scriptures advice that a person tells a rosary with 108 beads atleast once in a day simultaneously chanting the Lord's name, all the breaths find a purpose. If rosary is told with proper rituals, it yields hundred times more benefits. By proper rituals, it means telling of rosary atleast 100 times a day. Thus it equals (108 x 100) to 10800 i.e. equal to half the number of breaths during an Ahoratra. All it means to say that number of telling of rosary that is necessary to make the number of breaths purposeful can be known only with the help of a rosary having 108 beads. Hence provision for 108 beads in a rosary has been provided by our sages.
There is yet another reason for the provision of 108 beads in a rosary. There are 10800 Muhurts in a year. Three major Vedas also contain 10800 couplets. Average age of a human being has also been assumed to be 100 years. If 10800 Muhurts are divided by the average life span of a human being, we find 108. Telling of rosary atleast once a day depicts that a human being has finished study of Vedas in his entire life.