What is the Interstellar Medium?

Interstellar medium refers to a large number of diffuse gas clouds and tiny solid particles in the area between stars. The interstellar medium is mainly filled with gaseous hydrogen, and a significant amount of helium is also detected. A small percentage of the above-mentioned fine matter in the interstellar medium of the Milky Way galaxy where our earth is located accounts for about 5% of the total mass of the Milky Way galaxy.

Interstellar medium

The interstellar medium is mainly filled with gas

In the part of the Serpentine gas nebula M16, there are some forming stars in the three huge gas dust columns. The propagation of sound requires matter, which is called a medium in physics.

When a substance exists inside another substance, the latter is the medium of the former; the substances through which certain wave-like motions (such as sound waves, light waves, etc.) propagate are called these wave-like media. Also called media. For example: light passes through the lens, the lens is the medium; light enters the water, and water is the medium.