Let's talk about astronomy and the sciences a little bit. We want to talk about Indian astronomy itself. We had to go to pretty ancient times. Initially, Indians observed the heavenly bodies, and they tried to make sense of it, and they evolved it into stories. One such story was Chandra married the 27 daughters of King Daksha. Every day, our ancestors observed the moon rise in the Eastern horizon at a slightly different time. So if today it rises at 8:00 PM, tomorrow it might rise at 8:40. And they noticed it takes 27 days, approximately, for the moon to come back to the same backdrop of stars. So they divided the entire ecliptic into 27 segments, and they gave it a name. And mnemonic was the Wives of the Moon. By knowing the stories of the Naushatras, I might be able to tell you what will follow what. So Indians could mark the passage of time merely by looking at where is the moon against which backdrop of stars. Each of these segments is called a Naushatra. So it is presumed that moon would visit one wife each day, a lunar mansion, if you will. This is what our ancestors did.