What are the differences between Intergalactic Medium, Interstellar ...
Oct 29, 2021 · 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 …
How cold is interstellar space? - Astronomy Stack Exchange
Jun 2, 2016 · 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 …
the sun - How did the Local Interstellar Cloud form? - Astronomy Stack ...
Jul 20, 2024 · The Local Interstellar Cloud (LIC) is a low-density interstellar cloud which embed the Sun and other stars. How did this region form? I suppose a supernova or stellar winds from multiple stars …
What is a "Gentle Giant" Black Hole? - Astronomy Stack Exchange
Sep 12, 2023 · 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 …
interstellar medium - What is the word for space that is in the solar ...
Jun 27, 2016 · We distinguish space by its contents; the space within the heliosphere is called the interplanetary medium (it contains solar plasma, dust, etc.), while the interstellar medium comprises …
Interstellar movie: What is the "portal" to the other galaxy?
Jun 2, 2015 · I recently watched Interstellar with some friends and we didn't come to the same conclusion. In my opinion, the portal they use to go to the other galaxy (to visit the three planets) is …
Solar-system origin of interstellar bodies (like 1I/ʻOumuamua)?
Jul 6, 2025 · 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 …
How is it determined what celestial objects are considered to be part ...
Feb 28, 2025 · For a more local analogy, the interstellar asteroid Oumuamua passed well within the Solar System, yet is often not considered part of our Solar System, since it was never gravitationally …
Do Pulsar stars make actual sounds? - Astronomy Stack Exchange
Mar 25, 2024 · Minor point: sound can transmit in interstellar space, but only wavelengths much longer than the mean free path of particles in the interstellar medium, which is of order AU, unfortunately …
Could Black Hole Jets Help Recycle Matter Back into the Universe?
May 14, 2025 · Far from providing a path for mass or energy to leave the black hole itself, the jets are a sign that the black hole is collecting more mass. Their has been a lot of study of the interaction of …