Novas

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.

1. The core of the star can collapse to form a neutron star or a black hole.
2. The outer layers of the star can be ejected into space, enriching the surrounding interstellar medium with heavy elements.

it is Supernova

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.

Heavier elements are formed through nuclear fusion reactions in the core of a star. Hydrogen atoms are fused together under high pressure and temperature to form helium. Further fusion reactions involving helium nuclei lead to the formation of heavier elements like carbon, oxygen, and up to iron. These elements are produced through a series of nuclear reactions that occur as the star evolves.

When the sun uses up all its nuclear fuel and explodes, it is known as a supernova. During this catastrophic event, the star releases a tremendous amount of energy and creates a bright burst of light before eventually collapsing into a dense core.

When stars explode, they release a tremendous amount of energy in a violent explosion known as a supernova. Depending on the mass of the star, it may collapse into a compact object like a neutron star or a black hole, or scatter its materials into space, enriching the surrounding regions with heavy elements.

Cassiopeia is a constellation in the northern sky. It is one of the 88 modern constellations and occupies an area of 598 square degrees. It is easily visible in the northern hemisphere during certain times of the year.

The brightest stars, known as O-type stars, can have surface temperatures ranging from 30,000°C to 50,000°C (54,000°F to 90,000°F). These temperatures are significantly hotter than the surface of the Sun, which has a temperature of about 5,500°C (9,932°F).

Supernova.

We cannot be sure it won't.

What we can be sure of, for it to become a nova, it first has to become a white dwarf, and this will not happen for another 6 billion years. Then another star has to come close enough for material from it, to accrete onto the surface.

The chances of another star coming that close, is quite slim.

It's difficult to be precise because of the great distance from us (~6,500 light years). It either lies on the rim of the Orion arm or the rim of the Perseus rim. [See related link]

Hermes, the messenger god in Greek mythology, presided over trade and exchange. His size, often depicted as small or swift, is said to be influenced by the range of the brightest star, which may refer to his agility and flexibility in his role as the messenger god.

After a supernova explosion in Betelgeuse it will definitely become at least a neutron star. However, because of it's mass it's more than likely to become a black hole. If it does, then it will be the closest black hole to Earth.

The stars produced during a supernova event are known as neutron stars or black holes. Neutron stars are extremely dense remnants of massive stars, while black holes are formed when the core of a massive star collapses. Both neutron stars and black holes have unique properties and play a significant role in the cosmic landscape.

Pulsars are formed during a supernova event when a massive star explodes, leaving behind a dense core called a neutron star. As this neutron star rotates rapidly, it emits beams of radiation that we detect as pulses, hence the name "pulsars." So, pulsars are directly related to the remnants of supernova explosions.

Because they have been observed with the naked eye, optical telescopes, radio telescopes and neutrino detectors.

Look at a piece of gold, and you are looking at the result of a supernova explosion.

A Type II supernova occurs when a massive star with about 8-20 times the mass of the Sun exhausts its nuclear fuel and collapses under its own gravity. The mass required for a Type II supernova is typically around 8 solar masses.

The huge luminosity of a supernova comes from the incredible amount of energy released during the explosion. This energy is produced as the core of the star collapses and rebounds, causing a shock wave that propagates through the outer layers of the star and produces intense light and heat.

Massive stars with at least eight times the mass of the Sun end their lives as supernovae. During their final stages, they undergo a rapid collapse and explosion, releasing an immense amount of energy and forming a bright supernova.

They don't.

It's just an atmospheric effect that causes the stars light to fluctuate and thus make them appear as if they have the "common" star shape. In reality, they are all basically just round.

If you looked at a star from outer space you would see the difference.

Heavier atoms which could not be formed as a result of fusion are produced as the result of a star that has run out of fuel exploding. It essentially forces atoms which do not release energy to fuse together.

SN1987A was the the closest observed supernova since the invention of the telescope. The previous supernova, SN1604 was only observed with basic equipment and of course the naked eye.

It also gave astronomers the ability to calculate it's distance at 168,000 light years.

Yes you can see a white dwarf star. but you will need a powerful telescope.

The nearest white dwarf to us, is Sirius B at a distance of 8.6 light years. It was first discovered using a 18.5-inch (470 mm) aperture telescope.