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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.
Several partially ionized warm "clouds" of interstellar gas are located within a few parsecs of the Sun. Their hydrogen density is about 5 times higher than that of the Local Bubble. [70] For the last several ten thousand years the Sun passed through the LIC but within a few 1000 years the Sun will enter the nearby G cloud.
Porous chondrite dust particle. Cosmic dust – also called extraterrestrial dust, space dust, or star dust – is dust that occurs in outer space or has fallen onto Earth. [1] [2] Most cosmic dust particles measure between a few molecules and 0.1 mm (100 μm), such as micrometeoroids (<30 μm) and meteoroids (>30 μm). [3]
[f] [154] [155] Filling the space between the stars is a disk of gas and dust called the interstellar medium. This disk has at least a comparable extent in radius to the stars, [156] whereas the thickness of the gas layer ranges from hundreds of light-years for the colder gas to thousands of light-years for warmer gas. [157] [158]
A dark nebula or absorption nebula is a type of interstellar cloud, particularly molecular clouds, that is so dense that it obscures the visible wavelengths of light from objects behind it, such as background stars and emission or reflection nebulae.
Examples of the former case are giant molecular clouds, the coldest, densest phase of interstellar gas, which can form by the cooling and condensation of more diffuse gas. Examples of the latter case are planetary nebulae formed from material shed by a star in late stages of its stellar evolution .
Warning: Interstellar spoilers ahead! A decade before winning Best Director at the 2024 Academy Awards for Oppenheimer, Christopher Nolan released Interstellar.. The 2014 sci-fi drama features a ...
In the latter case, the object may be called an interstellar interloper. [ 3 ] The first interstellar objects discovered were rogue planets , planets ejected from their original stellar system (e.g., OTS 44 or Cha 110913−773444 ), though they are difficult to distinguish from sub-brown dwarfs , planet-mass objects that formed in interstellar ...