The 2011 Nobel Prize in Physics was awarded for the discovery of cosmic acceleration due to dark energy, a discovery that is all the more perplexing as nobody knows what dark energy actually is. We pu
To the eyes of the average person and the trained scientist, the night sky is dark, even though the universe is populated by myriads of bright galaxies. Why this happens is a question commonly called
If there are an infinite--or nearly infinite--number of stars in the universe, people began asking as modern astronomy became established, how could the sky ever be dark? It was non-scientists who fir
