“Space is big,” said Douglas Adams. “You just won’t believe how vastly, hugely, mind-boggingly big it is.” But why must this be so? And why does our Universe exhibit such tremendous scale, from the ...
The Universe is big, as Douglas Adams would say. The most distant light we can see is the cosmic microwave background (CMB), which has taken more than 13 billion years to reach us. This marks the edge ...
One of the biggest scientific surprises of the 20th century was the discovery that the Universe itself is expanding. Distant galaxies recede from us and from one another more quickly than the nearby ...
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