Actually Vedic sages have seen what ever can be seen in the universe. Vedic scientists gave the name pas’u to whatever could be seen.
In Vedas the word used for particle is Pas’u. Pas’u is derived from the root word, ‘Pas’ which means ‘to see’. The common meaning of Pas’u is animal. But Vedic meaning for Pas’u is visible or observable. That’s why the particle that can be seen is named as Pas’u in Vedas. It is clearly mentioned in Satapatha Brahmana 184.108.40.206-4.
Deity : As’va
Metre : Tristupa
From the hymn it is clear that it is certainly no ordinary horse. It is the description of As’va particle precisely. Our Sages described it as a flying horse. In verse one the wings are mentioned.
There is no flying horse having wings in reality. Flying is the character of quark particles in modern science. So As’va can be considered as one of the quark particles.
In verse two As’va is associated with Trita. Trita means 1/3, Modern scientists recently found that quarks carry 1/3 charge. So calling As’va by the name Trita means As’va particle carries one third charge.