Definition & Meaning of "interstellar medium"

Interstellar medium

the matter and radiation that exists in the space between stars within a galaxy

Example

The interstellar medium is made up of gas, dust, and cosmic rays.

Astronomers study the interstellar medium to understand cosmic evolution.

Space probes collect data on the composition of the interstellar medium.

Cosmic rays interact with the interstellar medium, producing radiation.

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