Question

if we go down and down in the universe what will come

Answer 1

if you are keep on going down the Earth then a situation will come when you will be in a country which is just opposite to India

Answer 2

Truly speaking there is parity I mean there is no such word direction up down .. if we go down and down doesn't mean anything we don't have any clue that it is down I mean no reference point to be exact if we take earth as a reference point there is no up down as it is a sphere what seems up for someone on it is down for someone.