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- Interstellar Dust properties - Astronomy Stack Exchange
While practicing for an upcoming examination, I ran into this problem: Which of the following best describes dust grains in the interstellar medium: They are a few hundred nanometers in size (siz
- 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 $\sim 10^ {-3}$ to $\sim 10^ {6}$ particles per cm $^ {3}$ 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
- 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)
- How can we know the density of particles in interstellar or . . .
The density of material in the interstellar medium is inferred from (i) the electromagnetic radiation it emits; (ii) its effect on electromagnetic radiation passing through it Often these approaches are combined to learn about different "phases" of the interstellar medium - e g hot, cold, high, or low density, ionised or not For example, we can learn about how much atomic hydrogen there is
- Can it be predicted if an Interstellar Object will get bound to the . . .
Recently I've reading there are only 2 known Interstellar Objects Suppose another one appears which will cross the solar system at some point, could it be predicted if it will get bound to the solar
- interstellar travel - How do we know about the origin of ʻOumuamua . . .
How do we know that ʻOumuamua is interstellar and not otherwise? I fail to understand the logic that the extraordinary speed of the object proves it to be of interstellar origin, and that our sun's gravity failed to capture it
- 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?
- Why do comets come from our local Oort cloud instead of from . . .
But why are they ejected to form specifically a local Oort cloud instead of going interstellar and becoming vagabonds? Per multiple models, most comets did become vagabonds
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