If we are in the nucleus, the 1s electron moves in the space around us. In no matter which direction you look, the electron has an equal chance to be found in that direction. The electron can be very far away or really close to us, but it is most of the time found at a distance close to the bohr radius (which is 5,3*10^(-11)m). It doesn’t need to be at exactly that radius but it is most likely that the distance between us and the electron is of a similar size.