If you spend a lot of time visiting astrology sites, you might run into the word 'yagya'. Probably not in the site's main body, but in some of the accompanying adverts. A yagya is a Hindu religious ceremony, that can supposedly boost your luck. It's a ceremony that you don't have to attend, which can be based on one's Hindu horoscope. The word 'yagya' is cognate with the English word 'ignite' - so it's connected with fire. One makes an offering to the gods, and fire consumes it.