{"id":55270,"date":"2024-02-23T07:47:49","date_gmt":"2024-02-23T07:47:49","guid":{"rendered":"http:\/\/95aa9ea1-5a6a-47fb-97f7-6e234c168f96"},"modified":"2024-02-23T08:32:28","modified_gmt":"2024-02-23T08:32:28","slug":"if-the-universe-is-infinite-has-it-always-been-infinite","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/bbcskyatnight\/rss_feed\/if-the-universe-is-infinite-has-it-always-been-infinite\/","title":{"rendered":"If the Universe is infinite, has it always been infinite?"},"content":{"rendered":"

Whether tiny, hot nugget or unimaginably huge cosmos, space goes on forever. <\/p>

By Govert Schilling\n <\/p>

Published: Friday, 23 February 2024 at 07:47 AM<\/p>

\n\n

Or you may be told that the Universe began as an infinitesimal, dimensionless point. In fact, the truth is much weirder.<\/p>

Yes, right after the Universe came into existence, some 13.8 billion years ago, space was incredibly more \u2018compact\u2019 than it is now, and both the temperature and the matter density of the Universe were incredibly high.<\/p>

Illustration of the expansion of the Universe. Credit: Mark Garlick \/ Science Photo Library<\/figcaption><\/figure>

But if our present Universe is infinitely large, it must always have been infinitely large, even at the primordial epoch when all spatial distances were, say, one billion times as small as they are now.<\/p>

After all, infinity divided by one billion is still infinity.<\/p>

What you can say is that our observable Universe \u2013 the 45-million-lightyear radius sphere that we can study at present \u2013 was once compressed into an incredibly tiny volume.<\/p>

But even back then, an infinite Universe just would\u2019ve gone on forever beyond the \u2018edge\u2019 of this imaginary grapefruit.<\/p>

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