the Wishaka gibbous

Wedas emphasise sacrifice.

Sacrifice needs fiery intensity.

Among all gods, Murugan personifies fire - as Shiva personifies space.

And he is known as Agni Bu hu.

Amara's Thesaurus lists him as
Senaani hi, Agni Bu hu, Guha ha.

Formless self that dwells in the cave of one's heart, finds expression in the world, as flame and fiery intensity.

- Shri Chandrashekarendra Saraswati, Kanchi. 

Orion crescent

Two kinds of retractions need to happen, for a human to evolve.

One happens by not paying much attention to senses - visual, listening, smell, taste and tactile.
This is known as Samam - and it leads to the experience of Shanti.

Another happens by not pampering the mind.
This is known as Damam - and it leads to Danti.

-  Shri Chandrashekarendra Saraswati, Kanchi.