Questions tagged [supernova]
A supernova is the explosive death of a star.
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What would happen if the sun became the size of the earth? [closed]
Imagine that a sudden force crushed the Sun from its current size down to the size of the earth,held it at that size for a few moments and then disappeared. What'd happen?
I haven't done any of the ...
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Does the formation of a neutron star always require a supernova explosion?
Is a supernova explosion an essential condition for the formation of a neutron stars?
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Stellar Core Collapse Speeds
If gravity determines the speed of free falling objects, but stellar core collapses happen much faster than the speed of free falling objects, wouldn't that indicate that stellar core collapses are ...
user394592
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Is there an equation that can predict black hole formation from neutron star formation from supernova occurrence?
If supernovas can be predicted depending on the mass of the a star, (If its more than about 8 times the mass of sun it will eventually go supernova - https://www.space.com/23756-white-dwarf-stars.html)...
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Can kink oscillations in supernovae magnetic fields accelerate cosmic ray protons beyond the GZK limit?
Kink oscillations in coronal magnetic loops may be heating the ions in the sun's corona up to 10 million K and beyond. Could such oscillations in supernova impart enough extra energy to protons to ...
user381695
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What photon energy is needed to photodissociate large elements?
During core collapse, the heat and pressure produces photons with energy levels that photodissociate iron. I was wondering what photon energy is required to do such a thing?
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What is the correlation between the Hubble tension and Dark Energy?
When Dark Energy was first discovered it was because we noticed that distance type 1A supernovae were dimmer given their perspective redshifts.
However, to determine the Hubble constant in the late ...
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Neutrinos from a Type 1a Supernova
How much energy does a Type Ia Supernova produce in the form of neutrinos?
I know that a Type II Supernova produces around $10^{45}$ joules worth of neutrinos, but not the amount produced by a Type 1a ...
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What's the nearest star that could go Supernova in the near future?
https://en.wikipedia.org/wiki/IK_Pegasi B is the nearest supernova candidate, but that white dwarf that's part of the system won't go supernova for around 2 billion years.
What's the nearest star that ...
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Why are black holes sometimes formed without supernovae?
I've heard that very massive stars can sometimes collapse into black holes without creating supernovae.
How does this happen?
(I suspect it's something to do with the relative lack of Urca process ...
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Absence of Coulomb's force [closed]
I am interested in understanding the potential consequences if Coulomb's force were to suddenly vanish on the behavior and interactions of various objects. If this fundamental force suddenly ceases to ...
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Is it possible to witness supernova events from the past? Do they repeat?
Astrophysicist I know recorded one in 2008. Later found to be exactly as one that happened in 1988. Could this actually be the same? Do they repeat?
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How many type II supernovae are there per stellar mass formed?
I have been searching for the number of type II (core-collapse) supernovae per unit of stellar mass formed.
It is my understanding that a star must have an initial mass of at least 8 times and no more ...
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Why don't less massive stars explode in form of supernovas?
I'm a high school student with a question about supernovas and the life cycle of stars. I understand that supernovas occur in massive stars when they run out of fuel and collapse, resulting in a ...
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Question on the relation between the Hubble constant and the absolute magnitude of Type Ia supernovae
I would like to ask a question about the relation between the Hubble constant and the absolute magnitude of supernovae
I have read that supernovae alone cannot fix $H_0$ and that there is a ...
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