Diffuse gas clouds and small solid particles contained between stars
Interstellar medium, also known as interstellar matter, is an area between stars containing a large number of diffuse gas clouds and small solid particles. It contains a great deal of vacuum, as well as a great variety of atoms, molecules and dust. In most cases, interstellar media occur in cloud like aggregates. The interstellar medium in the Milky Way is mainly located at the spiral arms, where there are a large number of young stars and nebulae. [1]
- Chinese name
- Interstellar medium
- Foreign name
- interstellar medium
- Latin name
- medium interstellar
- Abbreviation
- ISM
- Pinyin
- xīng jìjiè zhì
- Phonetic transcription
- ㄒㄧㄥ ㄐㄧˋㄐㄧㄝ ˋ ㄓㄧˋ
The interstellar medium is mainly filled with gas hydrogen 。 A considerable number of helium , and substances accounting for a small percentage, followed by calcium 、 water 、 ammonia and formaldehyde 。 In addition, there are quite a lot of dust particles with variable composition. Finally, there is the original cosmic ray Travel through interstellar space, and magnetic field Across many places in the region. In most cases, interstellar media occur in cloud like aggregates, sometimes with concentrations sufficient to form stars. On the contrary, stars continuously consume mass, some in the form of small bursts, and some in the form of Cataclysm Burst as Supernova 。 The quality is just like this feedback It returns to the interstellar medium and mixes with materials that have not yet formed stars. This cycle of interstellar matter through stars largely determines Cosmic cloud Internal weight element Content of. The interstellar matter in the Milky Way is mainly found in its outer part, the so-called Swivel arm There are a lot of young stars and Nebula 。 Interstellar matter is closely related to Galactic surface Agglomeration, which is a flat area, commonly known as Silver plate 。 radio telescope Can study and explain the emission of various components of interstellar medium Radio wave 。 For example, neutral hydrogen is characterized by wavelength That is, 21 cm wavelength, which absorbs or emits a very small amount of radio energy. Measure the wavelength and compare it with the adjacent wavelength to detect Absorbing hydrogen cloud or Emission hydrogen cloud 。 Serpent Gas nebula In part of M16, there are some stars forming in these three huge gas dust pillars. The propagation of sound requires matter, which is called medium in physics. When a substance exists inside another substance, the latter is the medium of the former; Some wavy movements (such as acoustic wave 、 light wave The substance by which it spreads is called the medium of these wavy movements. Also called media. For example, when light passes through a lens, the lens is the medium; When light enters water, water is the medium. 
