Polycyclic aromatic hydrocarbons in this region may be responsible for some of its namesake diffusion absorption bands.
Field's stability criterion for this region, expressed in terms of its cooling function, supports a pressure-balanced, two-component model of it. Polycyclic aromatic hydrocarbons in this region may be responsible for some of its namesake diffusion absorption bands. Most of its molecules are found in dark (*) clouds, which include GMCs and Bok globules. Absorption and emission of the 21-centimeter line in its neutral portions allows mapping of the rotation curve of the Milky Way. After crossing the heliopause, Voyager 1 is now in this region beyond the influence of the solar wind. For 10 points, name this dust and gas that fills the space between stars.
Field's stability criterion for this region, expressed in terms of its cooling function, supports a pressure-balanced, two-component model of it.
Interstellar Medium [or ISM; or Interstellar Space]