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Apr 11, 2022 · (Gas does have a few specific spectral lines, but they absorb only a tiny fraction of the light as it passes through.)The quantity of gas required to produce the observed absorption of light in interstellar space would have to be enormous. The gravitational attraction of so great a mass of gas would affect the motions of stars in ways that could easily be detected.
- Cosmic Rays
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- Interstellar Gas
The blue color seen at the edges of some of the clouds is...
- Cosmic Rays
May 20, 2024 · But for all the spectral space in-between these absorption lines the light will still pass through and be available for imaging. Cosmic dust is treated separately. These very small, solid particles might absorb some light, but they might also scatter even more. And this is where the wavelength becomes important.
May 3, 2023 · Objects shining in visible and ultraviolet (UV) light – stars, the boundaries of black holes – can heat the dust around them enough for that energy to be radiated in the infrared. That means infrared telescopes, such as NASA’s James Webb Space Telescope and the now-retired Spitzer Space Telescope, can see objects glowing in infrared light that results from visible and UV light being ...
(Gas does have a few specific spectral lines, but they absorb only a tiny fraction of the light as it passes through.)The quantity of gas required to produce the observed absorption of light in interstellar space would have to be enormous. The gravitational attraction of so great a mass of gas would affect the motions of stars in ways that could easily be detected.
- OpenStax
- 2017
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 ]
(Gas does have a few specific spectral lines, but they absorb only a tiny fraction of the light as it passes through.)The quantity of gas required to produce the observed absorption of light in interstellar space would have to be enormous. The gravitational attraction of so great a mass of gas would affect the motions of stars in ways that could easily be detected.
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Jul 12, 2012 · and dust, and about 1% is in the form of tiny dust grains made predominantly of silicates, rather like fine sand. Some grains are also composed of carbon and other elements. Interstellar dust plays many key roles in astronomy. Dust absorbs visible light, and so determines in large part what astronomers can see in the visible.
