Credit score: NASA/ESA/CSA/STScI
Hello of us, tune in each week of 2023 for the perfect in astronomy from Astronomy Editor Dave Eicher, dropped at you by Celestron. Dave’s weekly video collection will cowl all the most recent sky occasions, scientific outcomes, overviews of cosmic mysteries, and extra!
This week we’re speaking concerning the distance scale of the cosmos. It’s completely superb to know that shortly after the Huge Bang, the universe was a comparatively small, practically infinitely dense place. It boggles the thoughts.
However that was 13.8 billion years in the past. The increasing universe means the whole thing of what we all know is now extremely massive — and is getting extra immense each day.
In science fiction, the concept that know-how will know practically no bounds, and that we are going to nearly actually one day journey between star methods, is just about taken on religion. However sci-fi films fail to speak that the universe is an immensely massive place. Even distances between the closest objects are staggering, and the distances throughout the Milky Way Galaxy and definitely between galaxies within the universe are astonishingly big to residing beings caught on a planet.
To visualise these distances your self, you may take a look at the dimensions mannequin detailed in Dave’s feature from our August 2019 issue. And for extra on how astronomers measure distances within the universe, take a look at this feature from Senior Editor Alison Klesman on the cosmic distance ladder.
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