Question

what is outside the universe kindly tell

Answer 1

it's not being searched yet scientists are trying hard to find it

Answer 2

Here’s an artists impression/map of the entire observable universe. The artist, Pablo Carlos Budassi, has used an exponential scale to make it fit. You will see the Earth/Solar system in the centre, and as you move out, the scales increases exponentially. The light travelling back to us from the “edge” is showing what it looked liked in 13.8 billion years ago (when it was really small!?).