If the antenna was pointed at the sky, the noise appeared. The pointing direction and time of day didn't matter. The annoying noise was, in fact, the primordial radiation left over from the Big Bang. Galaxies form from condensation of tabular masses. Stars form from gravitational pull of matter.
Temperatures rise, nuclear fusion begins, and stars become energy producing.
There are 100 billion billion stars. Our Galaxy is the Milky Way. Formed 15 billion years ago. We are in the outer rim. Formed from a solar nebula a swirling cloud of gas and dust.