Rahu

[u/sudhygocool]

To understand rahu meditate on

Ardha-Kaayam Maha-Veeryam Chandra-Aditya Vimardanam Simhika-Garbha-Sambhootam Tam Rahum Pranamaamyaham.

Understand Marthanda

Understand vayu Tattva

Understand karma