Arunachala is the deity of the cosmos. It is the great piligrimage centre not only for Earthlings but also for billions of alien civilizations all over the known and unknown cosmos.
It is the Father, It is the Mother.
Imagine an alien spaceship coming from a planet in Andromeda Galaxy perhaps. Imagine aliens doing the regular girivallam in a spaceship.
Girivallam by aliens.
(photos courtesy Google Earth)