What is space?

Question

Is it vacuum or any thing else

Answer 1

Space has been an interest for philosophers and scientists for much of human history, and hence it is difficult to provide an uncontroversial and clear definition outside of specific defined contexts. Disagreement exists on whether space itself can be measured or is part of the measuring system. The term is also used somewhat differently in different fields of study. Many fields use an operational definition in which the units of measurement are defined.

Answer 2

Space is the volume measured by distance along three orthogonal axes. If it contains no matter, it's called a vacuum. If it contains only dark matter, it's probably still called a vacuum since we really don't know that dark matter is. If the distances are large (measured in light-years), we used to call that outer space. It's extremely difficult to remove all matter from a particular space, so even if it still has a few molecules of matter, we still call it a vacuum, reserving the term perfect vacuum for a space with no matter at all. I don't know if humans have yet achieved that.

I've avoided the deeper philosophical question by defining it in terms of distance. So, don't ask what distance is.

Answer 3

It is the place between. Ionized particles. Space is a vacuum in the manner that it has no overall atmosphere. A physics student informed me that there is no such thing as a vacuum. Look it up.

Answer 4

The final frontier.

Answer 5

It is the lack of things.

Answer 6

Where neither matter nor non-matter nor anti-matter exists.

Answer 7

Black matter