Aug 29, 2014 . No, the night sky will not eventually end up completely black. It is true that the universe is expanding, which causes many stars to be farther and..
We see stars all around, so why doesn't their combined light add up to make our night sky--and surrounding space, for that matter--bright? German physicist Heinrich Wilhelm Olbers put the same puzzle this way in 1823: If the universe is infinite in size, and stars (or galaxies) are distributed throughout this infinite universe,..
Apr 18, 2014 . We've all seen the fantastic Hubble images; they show millions of galaxies that contain billions upon billions of stars. In our galaxy alone, there are more than 100 billion stars. And in 2010, scientists estimated that there are over 300 sextillion stars in the universe (which looks something like this,..
Dec 2, 2015 . It sounds obvious. That's what night is. The sun has set and when you look up at the sky, it's black. Except where there's a star, of course. The stars are bright and shiny
Dec 2, 2015 . That's what night is. The sun has set and when you look up at the sky, it's black. Except where there's a star, of course. The stars are bright and shiny. But wait. Imagine you are deep in a forest. All around you there are trees. Wherever you look, you are looking at a tree. Maybe a big tree close up or a bunch..
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