Invisible universe. Dark secrets of space. Christiansen J.R.

For the powerful visible universe, which envelops us at night, is hiding something else and much more impressive. Most astronomers today believe that ninety -five percent of the contents of the Universe is invisible.

everything that we observe in everyday life and in beautiful pictures from the Hubble telescope is probably only five percent of what is hidden. In space. The rest is dark matter and energy-that part of reality that we have just begun to understand. So what are these dark invisible substances? And how can we be so confident in their existence?