Before sleep during the previous day I heard for few times to take on learning on astronomy. I was surprised. Astronomy, I wondered?

When sleeping, I was sort of being tutored on the black hole in our galaxy - in the center of the galaxy. I was out of the body, in the cosmos, looking from a distance on the big star system close to the black hole (it was presented as black, while the background around was not black - it was slightly dark blue due to the intensive light of stars, unlike we see the cosmos on the sky from the Earth).