npub1mev5mmxyu5fced8x3gngaj3nkv94mwj3w07nku337dk3t0mes2ksa5sf0a (npub1mev…sf0a)
I don't think there is one in Tamil.
Galaxy itself is vinmeen mandalam (agglomeration of skyfish)
We have a great name for the Milky Way from Sanskrit, which was what the "astronomers" of ancient India (with their different mother tongues) probably called it... it's AakashGanga (Space/Sky Ganga).