Using Hubble Deep Field images, astronomers predicted the observable universe — that which is observable from Earth — contains between 100 billion to 200 billion galaxies. A team of international researchers now says the universe likely contains 10 times as many galaxies as previously believed — and the vast majority are too faint and far for us to see. (NASA, ESA/Hubble)"It boggles the mind that over 90 per cent of the galaxies in the universe have yet to be studied. Why is the night sky dark? If the universe was infinite and unchanging, there would be no such thing as a night sky, according to Olbers' paradox.

Source: CBC News October 13, 2016 20:26 UTC