A conjunction (yuti) occurs when two or more planets sit in the same sign of a birth chart, merging their energies. When Sun and Rahu conjoin, the chart blends Sun's the soul, authority and vital life-force, Rahu's obsession, worldly ambition and the pull of illusion. This is a intense combination, with 0 benefic and 2 malefic planets involved.
Grahan (Eclipse) Yoga
This conjunction forms the well-known Grahan (Eclipse) Yoga, which gives a strong but restless ego and ambition; recognition can come suddenly, with ups and downs around authority.
How the Planets Interact
Sun and Rahu are hostile. Friendly planets amplify each other's good results, while hostile planets compete for the same space, creating inner tension that the native must consciously balance. The strongest planet in the group, by dignity, tends to dominate the expression of the conjunction.
Combined Effects
Practically, Sun and Rahu together colour the affairs of whichever house they occupy with a mix of soul (atma), obsession & ambition. Being an intense combination, it demands maturity, but rewards discipline with real strength.For a precise reading, the sign, house and dignity of each planet in your own chart must be examined together.