What is instelluar space composed of?

Answer 1

Correct me if I'm wrong but space is a vacuum. It it absolute nothingness but it is a dimension still, goes back and forward, up and down, and is part of the normal time continuum unless an anomaly is present like a black hole.

Answer 2

Simply put, the interstellar medium is the material which fills the space between the stars. Many people imagine outer space to be a complete vacuum, devoid of any material. Although the interstellar regions are more devoid of matter than any vacuum artificially created on earth, there is matter in space. These regions have very low densities and consist mainly of gas (99%) and dust. In total, approximately 15% of the visible matter in the Milky Way is composed of interstellar gas and dust.

Answer 3

Hmm, I was always told that half of the visible mass of the galaxy is stars, the rest is dust and gas (dust & gas = interstellar medium = the stuff between the stars).

The gas is primarily hydrogen (roughly 3-quarters) and helium (about 1-quarter). There are other gases.

The dust is all the other (solid) stuff that evenutally makes planets like Earth. In fact, all the particles in our bodies were once part of the interstellar medium!

Answer 4

Inter stellar space is just that,space.
There may be some hydrogen but beyond that space is what separates the stars and galaxies.