Why the vast emptiness of space isn’t really that empty after all

House-time could appear empty, however the expanse between stars is full of extra fascinating stuff than it’s possible you’ll suppose, writes Chanda Prescod-Weinstein


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four 2020

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SPACE-TIME is usually empty. Although there are a minimum of 100 billion galaxies – every house to round 100 billion stars – and plenty of galactic mud, the universe is so huge that there are big tracts of space-time between every star and extra nonetheless between each galaxy. Even the closest star to Earth (the solar) is sort of 150 million kilometres away, that means the quickest factor within the universe (gentle) nonetheless takes eight minutes to get from there to right here, regardless of travelling at 300,000 kilometres per second.

It looks like most of what’s between Earth and the solar …



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