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- What are the differences between Intergalactic Medium, Interstellar . . .
The interstellar medium (ISM) is, as you say, the gas (and dust) in between the stars, within a galaxy It consists of molecular, neutral and ionized gas, with densities ranging from ∼10−3 ∼ 10 − 3 to ∼106 ∼ 10 6 particles per cm 3 3 and temperatures ranging from a few K up to 10,000 or 20,000 K The molecular gas is the coldest and densest, usually found in molecular clouds The
- Is the angular size of the black hole in the movie interstellar . . .
3 I assume everybody is tired of reading questions derived from the movie Interstellar, I will try to keep this short and simple: In general in movies, in order to have stunning visuals, celestial objects are displayed as if they were extremely close to the observers, having a enormous apparent angular size
- terminology - Is intrastellar commonly used by astronomers to refer . . .
Quick checks of a few of them show a mixture of simple typos (i e , "intrastellar" used when "interstellar" is clearly meant), awkward failed attempts at synonyms for "intracluster stellar light", and actually correct uses meaning "inside a star" would extrasolar be used by astronomers to refer to objects outside of our solar system?
- How does interstellar matter density vary? - Astronomy Stack Exchange
The interstellar medium is a multiphase medium, and you can find (some references in this lecture and in this thesis manuscript (this one is in French, but numbers are international)): the hot ionized medium (HIM) with density as low as 10^-3 cc (particles per cubic centimeter); the warm ionized medium (WIM), with density of the order of 0 03 cc; the warm neutral medium (WNM), with density of
- Do interstellar asteroids decelerate and eventually stop?
I do wonder, do interstellar asteroids eventually stop at one point in space after they gradually decelerate (or) even do they decelerate? Though there is no air like on earth and thus asteroids will not be affected by frictional forces, do they have friction with gravitational forces against their trajectories?
- How cold is interstellar space? - Astronomy Stack Exchange
The density of the interstellar medium is so very, very low that radiation losses completely dominate over conduction from the medium The interstellar medium can be very hot precisely because it is a gas (gases are a bit weird), and because it is extremely tenuous (extremely tenuous gases are beyond weird)
- Is interstellar matter even detectable at (near) 0 kelvin?
Just how dense would interstellar matter have to be to even (practically) detect it with spectroscopy, if being near 0 kelvin (read: far away from nearby stars) affects its spectral readings?
- interstellar medium - Speed of light through the ISM and Wavelength . . .
You can find a neat description and some examples of the effect here This is known as the pulsar dispersion measure As you correctly say, waves with longer wavelength (lower energy photons) are delayed with respect to shorter wavelength radiation from the same phenomenon When electromagnetic waves travel through a plasma, they excite currents in the free charged particles In such cases it
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