the seemingly empty space between stars that is actually composed of particles from a variety of sources

is the gas and dust from earlier stars which have exploded. The explosions are largely responsible for the creation of the chemical elements and for the spread of this matter, in the form of clouds, out of which new stars are formed.

The matter between stars, composed of two components, gas and dust, intermixed throughout all of space.

interstellar space including streams of protons moving from the stars

The gaseous and dusty matter present in the space between a galaxy's stars.

The gas spread across the Galaxy that constitutes the raw material of star formation; composed of mostly hydrogen and helium.

he gas and dust between the stars that fills the plane of the galaxy. For centuries, scientists believed that the space between the stars was empty. It wasn't until the eighteenth century, when William Herschel observed nebulous patches of sky through his telescope, that serious consideration was given to the notion that interstellar space was something to study. It was only in the last century that observations of interstellar material suggested that it is not uniformly distributed through space, but rather has its own unique structure.

interstellar clouds of gas and dust. More than sixty molecular species have been discovered in the interstellar medium including carbon monoxide, alcohol and formaldehyde. Most of the matter of the interstellar medium is hydrogen with some dust grains composed mainly of ice particles (carbon and silicates).

Gas and dust found between the stars in a galaxy.

ISM; The gas and dust particles that exists between the stars everywhere in a galaxy. In most places it is extremely tenuous; the average density of atoms is only about 1 per cubic cm. The elemental composition of the gas is roughly 75% H and 25% He (this came out of the Big Bang), plus small amounts of O, C, N, and heavier atoms (all of which have been manufactured in stars). Astronomers like to refer to elements heavier than He as 'metals'.

The gas and dust that exists in open space between the stars.

(ISM): The term astronomers to describe all gas and dust in the plane of the galaxy that exists "between the stars." The ISM can be ionized if it is diffuse and near a radiation source (such as a star), but the denser more isolated regions of the ISM typically consist entirely of molecules both in the gas phase and frozen onto dust grains.

simply, this is the "stuff between the stars". This includes gas and dust that can be found between stars.

The interstellar medium is the dust and gas (mostly hydrogen) that are between stars in a galaxy. The interstellar medium is no very dense at all; at its densest, it is emptier than the best vacuum we can produce on Earth.

The gas and dust distributed between the stars. Interstellar Reddening The process in which dust scatters blue light out of starlight and makes the stars look redder than they actually are.

Electrified gas and dust between the stars.

All the gas and dust found between stars.

Regions of space between stars populated by gas and dust. Astronomers presently estimate that the interstellar medium accounts for 10 percent of galactic mass.

the region of gas and dust particles in the Milky Way system between the stars.

The interstellar medium (or ISM) is the name astronomers give to the gas and dust that pervade interstellar space. While the ISM refers to the matter that exists between the stars within a galaxy, the energy, in the form of electromagnetic radiation, that occupies the same volume is called the interstellar radiation field.