Scientific Definition: Transition (Sankranti) of Sun to Makar (Capricorn) Constellation ie Sun has this Constellation in the Background in Sky for 1 Solar Month
I have hand edited the diagram for you to Understand. And There are 12 Sankrantis in a Year 🧵
2. Similarly on 13/14 April, We get Mesh Sankranti, When Sun Transits into First of the twelve Zodaic (Mesh)
3. But Why TIL-GUD on Makar Sankaranti ?
Makar Rashi is Ruled by Saturn.!
Saturn Welcomes Father SUN in his House of Makar (Ruled by SATURN)
तिल (Saturn) + गुड (Sun) = तिलगुड़ is feasted as a mark of Union i.e. Seasame+ Jaggery
Due to grinding/beating of तिल it is also called तिलकुट