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The interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes gas in ionic, atomic, and molecular form, as well as dust and cosmic rays. It fills interstellar space and blends smoothly into the surrounding intergalactic space.
The density of matter in the interstellar medium can vary considerably: the average is around 10 6 particles per m 3, [135] but cold molecular clouds can hold 10 8 –10 12 per m 3. [38] [133] A number of molecules exist in interstellar space, which can form dust particles as tiny as 0.1 μm. [136]
It is customary in astronomy to use the Roman numeral I for neutral atoms, II for singly-ionized—HII is H + in other sciences—III for doubly-ionized, e.g. OIII is O ++, etc. [1]) These regions do not emit detectable visible light (except in spectral lines from elements other than hydrogen) but are observed by the 21-cm (1,420 MHz) region ...
An interstellar cloud is generally an accumulation of gas, plasma, and dust in our and other galaxies. But differently, an interstellar cloud is a denser-than-average region of the interstellar medium , the matter and radiation that exists in the space between the star systems in a galaxy.
The mantles of interstellar ice grains are generally amorphous, becoming crystalline only in the presence of a star. [3] The composition of interstellar ice can be determined through its infrared spectrum. As starlight passes through a molecular cloud containing ice, molecules in the cloud absorb energy. This adsorption occurs at the ...
Christopher Nolan's sci-fi film, starring Matthew McConaughey, Jessica Chastain and Anne Hathaway, hit theaters 10 years ago
In outer space it is expected to be formed in a similar manner on a variety of cold ... 0.9167 g/cm 3: ... roles of ice XI in interstellar space [186 ...
Christopher Nolan’s Interstellar was so popular it was re-released in theaters for its 10th anniversary and shot to Netflix's top 10 when it was added to the streamer in January 2025.. Starring ...