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Novas
Supernovas and Novas are terms to describe the massive explosion of a star that has reached the end of its life.
357 Questions
How big is the Sun compared to VY Canis Majoris?
VY Canis Majoris (VY CMa) is the largest known star and also one of the most luminous.
It has a radius of around1,800 -> 2,100 times that of our Sun. If the Sun was replaced by VY Canis Majoris, it's outer envelope would extend beyond Saturn.
See related link for a pictorial.
What is left when stars explode?
When smaller stars explode (like our Sun), they leave a nebula cloud by releasing their gas and they become a small but dense white dwarf star.When big stars explode (like Betelgeuse), they have a massive explosion called a supernova and the core of the star turns into a black hole or a pulsar.
What kind of star go through supernova?
Supernovae occur in stars that have reached the end of their life cycle and have run out of nuclear fuel to support their core. This typically happens to massive stars with at least eight times the mass of the sun.
When does a nova event occurs if a white dwarf accepts material from a nearby?
A nova event occurs when a white dwarf in a binary system accepts material from a nearby companion star, causing a runaway nuclear fusion explosion on the surface of the white dwarf. This explosion results in a sudden increase in brightness that can last for several days to a few weeks.
Which region of the Sun is typically about 6000 C?
The photosphere's average temperature is 5,800 kelvin
What factor determines if a neutron star forms or a black hole forms after a supernova explosion?
The factor that determines whether a neutron star or a black hole forms after a supernova explosion is the mass of the collapsing core of the star. If the core's mass is between about 1.4 and 3 times the mass of the sun, a neutron star is formed. If the core's mass exceeds about 3 solar masses, a black hole is likely to form.
Which event marks the beginning of a type II supernova?
The collapse of the star's core is the event that marks the beginning of a type II supernova. This collapse leads to the rapid release of energy, causing the outer layers of the star to be expelled in a violent explosion.
Describe a typical nearby star?
A typical nearby star, like our sun, is a main sequence star that generates energy through nuclear fusion in its core. It emits light and heat, supporting life on any orbiting planets. These stars can range in size, temperature, and color, with some being hotter and more massive than the sun, while others are cooler and smaller.
What happens after a supernova of a very massive star?
After a supernova of a very massive star, the core collapses to form either a neutron star or a black hole. The outer layers of the star are ejected into space, enriching the surrounding environment with heavy elements. A bright burst of radiation, known as a gamma-ray burst, may also be emitted during this process.
A white dwarf is the remnant of a star like our sun which forms when the stars runs out of elements to fuse. As such it will not kill you directly but if you were on the earth then you would freeze to death because the sun would no longer be producing the amount of heat that it does now.
There are however situation where a white dwarf could kill you directly. When a white dwarf is in orbit round a normal star in a binary system, it is possible for the white dwarf to 'steal' gas from its companion. This hydrogen gas can accumulate on the what dwarf's surface and may periodically explode as a 'nova'. If, over time, enough material is stolen to make the white dwarf heavier than 1.4 solar masses (the Chandrasekhar limit), it will then explode as a type 1a 'super nova' which will destroy the white dwarf completely. If you were on a planet orbiting a star near such an explosion, it would kill you.
What is the core of a star left over from a supernova explosion?
The core of a star left over from a supernova explosion is called a neutron star. Neutron stars are incredibly dense, composed mostly of neutrons, and have strong gravitational and magnetic fields. They can be very small in size but contain a mass greater than that of our Sun.
No, a nova is not a star itself, but rather an astronomical event that occurs on the surface of a star. A nova is a sudden, temporary increase in brightness caused by the explosion of material on the surface of a white dwarf star.
Is it possible to force a star to go supernova before its time?
I guess there are really only 2 methods, should you even wish to attempt something so foolhardy :-)
- If you removed a lot of the stars hydrogen, this would invoke the core to collapse and start helium carbon fusion earlier.
- By adding a hell of a lot of hydrogen to the star, you could increase the pressure on the core, causing the star to use up it's supply of hydrogen faster than it would before. Thus invoking the supernova early.
How you would do this, or even how you would get there is anyones guess - let alone why?.
How big does a supernova gets before it explodes?
A supernova *is* the explosion. A super nova is caused by one of a few stellar events:
A) Sudden collapse of a star, which causes massive carbon fusion.
B) The gradual accumulation of material by an already collapsed star until the mass is enough to compress the core of the star and start fusion of the element carbon (normal stars fuse hydrogen)
What will it be called when the sun explodes?
When the sun exhausts its fuel and expands into a red giant before eventually shedding its outer layers to form a planetary nebula, this event is known as a "stellar evolution process". The eventual fate of the sun is to collapse into a white dwarf.
What is the adverb phrase of a black hole is the remains of a supermassive star after a supernova?
"after a supernova" is the adverb phrase in the sentence.
What can form after the supernova of a red giant?
After the supernova of a red giant, remnants such as a neutron star or a black hole can form, depending on the mass of the original star. If the star was especially massive, it may also result in a supermassive black hole or a hypernova explosion.
Classify the capitalized words a black hole is the remains of a supermassive star after a supernova?
"Black hole" is a compound noun referring to a collapsed star with immense gravitational force. "Supermassive" is an adjective describing the vast size and mass of the star before it collapses into a black hole. "Supernova" is a noun indicating an explosive event that occurs when a star reaches the end of its life cycle.
What is the difference in between nebula and solar nebula?
A solar nebula is related to the formation of our Solar System, any other nebula is just a nebula.
The corresponding white dwarf needs to reach a temperature for nuclear fusion to occur, which is about 20 million degrees kelvin.
A star that explodes temporarily increasing it's brightness 100000 times or more?
This phenomenon is called a supernova. It occurs when a star reaches the end of its life cycle and undergoes a catastrophic explosion, causing a sudden burst of light that can increase its brightness enormously. Supernovae play a crucial role in dispersing heavy elements into space and are important for understanding the evolution of galaxies.
What are two possible results of a supernova explosion?
- The core of the star can collapse to form a neutron star or a black hole.
- The outer layers of the star can be ejected into space, enriching the surrounding interstellar medium with heavy elements.
No, Pollux is not a white dwarf star. It is an orange giant star that is nearing the end of its life cycle. White dwarfs are remnants of stars like the Sun after they have exhausted their nuclear fuel.
