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English: The interstellar medium is matter that occupies the vast space between the stars in a galaxy. Similarly, matter that exists in the space between galaxies is called the intergalactic medium.
matter and fields (radiation) that exist in the space between the star systems in a galaxy;includes gas in ionic, atomic or molecular form, dust and cosmic rays. It fills interstellar space and blends smoothly into the surrounding intergalactic space
|Part of||outer space|
This category has the following 4 subcategories, out of 4 total.