What is space? – Definition of our universe and beyond

We often refer to our expanding universe with one simple word: space. But where does space begin and more importantly, what is it?

Space is a near-perfect vacuum, almost devoid of matter and with extremely low pressure. In space, sound is not carried because there are no molecules close enough to each other to transmit sound between them. Not completely empty, pieces of gas, dust, and other matter float around the “emptier” regions of the universe, while the more densely populated regions may contain planets, stars and galaxies.

https://www.space.com/24870-what-is-space.html What is space? – Definition of our universe and beyond

James Brien

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