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Is it possible for a meteor the size of the moon to enter our solar . . . And to answer the question about an interstellar "meteor the size of the Moon", that is even more impossibler than an interstellar "meteoroid the size of the Moon" A meteor is not a solid object It is a streak of light which people see in the sky as a meteoroid or an asteroid falls through Earth's atmosphere
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
Is the angular size of the black hole in the movie interstellar . . . 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
What is a Gentle Giant Black Hole? - Astronomy Stack Exchange A similar phrase, "gentle singularity," is used in the movie Interstellar There has been some discussion about that, in which the consensus seems to be that the size of a supermassive black hole reduces the tidal forces at the event horizon, such that a falling entity would not be spaghettified
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
solar system - In theory, could an object like Oumuamua have been . . . Maybe, but the probability is very low There are excellent answers at the recent related question, Can it be predicted if an Interstellar Object will get bound to the solar system by knowing its speed and direction? But I'll take this opportunity to give some actual numbers relevant to the trajectory of 'Oumuamua Horizons has a file for 'Oumuamua From the body data page, 1I 'Oumuamua (A
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)
Why does rotation prevent the further contraction of the cloud? In the book Horizons: Exploring the Universe (2018) by M Seeds and D Backman, chapter 9, page 170-171, it states that: At least four factors resist the compression of an interstellar gas cloud, and
Solar Winds and Bow Shock Cause - Astronomy Stack Exchange At the edge of our solar system, where the solar winds pass through and enter the interstellar medium there was an expectation of bow shock but instead it was far diminished The two reasons I can deduce for this is that the interstellar medium is moving slower than we thought and magnetic density is higher than we thought
How to count observable number of galaxies at a given latitude . . . 2 If galaxies are uniformly distributed in space, then in the absence of extinction, the number of galaxies per square degree brighter than magnitude m is given by $$\log_ {N_0} (m) = 0 6m + C$$ How will the formula look like if extinction in the interstellar medium is counted?