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
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 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
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)
Nomenclature of Interstellar Objects and Stars One type is diffuse nebulae, which are "clouds" of gas and dust in interstellar space, often many light years across They include emission nebulae which are heated by stars and so emit light, reflection nebulae which reflect light from stars, and dark nebulae which block light from stars and nebulae beyond them
Solar-system origin of interstellar bodies (like 1I ʻOumuamua)? I understand that 1I ʻOumuamua and the other two bodies (2I Borisov and 3I ATLAS) are classified as interstellar objects based on their distance from the Sun and their speed In other words the sum
What is the temperature of outerspace? - Astronomy Stack Exchange In interstellar space there exist hot (e g 10,000 K) and cold gas clouds Due to the very low density, hot and cooler fractions can penetrate each other, such that there doesn't need to be a uniquely defined temperature The large-scale average temperature of outer space should be 2 7 K (about -270 5 C), close to the CMB black body temperature
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?
interstellar medium - Why does dust affect UV light more severe than it . . . 7 My supervisor told me that the UV photons emitted from AGN are heavily affected by ISM (dust extinction), but not X-rays, as described in Extinction - a powerful discriminator of dust size Since X-ray and UV are all photons with different levels of energy, why does dust (interstellar medium) affects UV more than X-rays?