Mapping the Heavens

July 25, 2016

“Once upon a time, the Universe meant the Sun, the Earth and five naked-eye planets. By the start of the 20th century, it had been redefined to mean the Milky Way, a swirling disc of stars to which the Sun belongs. Today, it means the 100 billion or so “galaxies”, including our Milky Way, which are flying apart like pieces of cosmic shrapnel in the aftermath of the Big Bang 13.82 billion years ago…” Review of Mapping the Heavens

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