A neutron star is a type of stellar remnant that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event.

The brightest stellar event in recorded history was the SN 1006 supernova, which was observed in 1006 and written about by the Egyptian astronomer Ali ibn Ridwan and several Chinese astronomers.

Although no supernova has been observed in the Milky Way since 1604, supernovae remnants indicate that on average the event occurs about once every 50 years in the Milky Way.

Three hundred years later, the American astronomical historian William Ashworth suggested that what Flamsteed may have seen was the most recent supernova in the galaxy's history, an event which would leave as its remnant the strongest radio source outside of the solar system, known in the third Cambridge ( 3C ) catalogue as 3C 461 and commonly called Cassiopeia A by astronomers.

Supernova nucleosynthesis is also thought to be responsible for the creation of elements heavier than iron and nickel ( Z > 26-28 ), in the last few seconds of the explosion of a supernova, such as a type II supernova event.

In extreme cases this event can cause the white dwarf to exceed the Chandrasekhar limit and trigger a supernova that destroys the entire star, and is another possible cause for runaways.

An example of such an event is the supernova SN 1572, which was observed by Tycho Brahe.

Light curves can be periodic, as in the case of eclipsing binaries, Cepheid variables, other periodic variables, and transiting extrasolar planets, or aperiodic, like the light curve of a nova, a cataclysmic variable star, a supernova or a microlensing event.

Eta Carinae's chief significance for astrophysics is based on its giant eruption or supernova impostor event, which was observed around 1843.

This supernova event was observed in a galaxy about 240 million light years ( 72 million parsecs ) from Earth.

The following year, a supernova within Messier 87 reached a peak photographic magnitude of 21. 5, although this event was not reported until photographic plates were examined by the Russian astronomer Innokentii A. Balanowski in 1922.

Master of Orion will sometimes produce random events which can be harmful or advantageous, such as discovery of ancient ships and technology, changes to planetary conditions that alter the planet's population or mineral richness, diplomatic blunders / assassination attempts, changes to research, industry or treasury production, planetary rebellion, space piracy and either viruses or a supernova event ( both of which require research from the affected planet to overcome ).

The location of the supernova event was 16 ″ from the relatively bright nucleus of the galaxy.

The only supernova event observed within this galaxy is SN 1969Q, discovered in June 1969.

In the 2220s the Dilgar learned that their sun was about to go into a supernova stage, an event which would completely destroy their world.

Furthermore, associating the event described with the sighting of a supernova in 1054 would require the supposition that the Cronaca Rampona entry was in the wrong place in relation to the rest of the document, as the different entries are in chronological order and several previous entries are later than 1054 ( in order, the previous entries refer to 1046, 1049, 1051, 1055, 1056, written in a mix of Arab and Roman characters, namely Mxl6, Mxl9, Mli, Mlv and Ml6 ).

Finally, even considering that the stated event corresponds to May or June 1054 nevertheless, and describes a conjunction between the already visible supernova and the moon, another problem arises: during those months, the moon did not pass very close to the location of the supernova.

The time of the event is also not known, but it seems that the event only happened on one day and not for a longer period as would have been the case for a sighting of the supernova.

In the opposite way, they reinterpret the European documents as relatively corroborating in relation to the fact that a notable astronomical event occurred in Spring 1054, before the conjunction between the supernova and the sun.

However, this “ South-East ” direction has long left modern astronomers perplexed in the context of this event: the logical remnant of the supernova corresponding to the guest star is the Crab Nebula, but it is not situated to the southeast of ζ Tauri, rather in the opposite direction, to the northwest.

Designated SN 1987a, this event was of enormous importance to astronomy, as it was the closest known supernova to Earth, and the first visible to the naked eye, since Kepler's star in 1604 – before the invention of the telescope.

In 2011 a supernova was discovered in the constellation.

Alternatively, the supernova may have resulted from the merger of two white dwarfs, so that the limit was only violated momentarily.

Nickel-78's half-life was recently measured to be 110 milliseconds and is believed to be an important isotope involved in supernova nucleosynthesis of elements heavier than iron.

The supernova that created the Crab Nebula, the SN 1054, was observed by Arabic and Chinese astronomers in 1054.

Though this was a supernova and not a classical nova, the terms were considered interchangeable until the 1930s.

The supernova of 1604 was first observed on October 9, 1604, near θ Ophiuchi.

Johannes Kepler saw it first on October 16 and studied it so extensively that the supernova was subsequently called Kepler's Supernova.

An even more speculative hypothesis is that intense radiation from a nearby supernova was responsible for the extinctions.

The SN 1054 supernova, which gave birth to the Crab Nebula, was also observed by Chinese and Islamic astronomers.

In Cryptic Studios online role-playing game, Star Trek: Online, Janeway is briefly mentioned in the background, exploring the Hobus system after the supernova that was the catalyst for the events of the 2009 Star Trek movie.

Spock was dispatched to stop the supernova with a red matter device but arrived too late.

The word supernova was coined by Walter Baade and Fritz Zwicky in 1931.

The SNO detector would have been capable of detecting a supernova within our galaxy if one had occurred while the detector was online.

As a result, the detector ( KamiokaNDE-II ) had become sensitive enough to detect neutrinos from SN 1987A, a supernova which was observed in the Large Magellanic Cloud in February 1987, and to observe solar neutrinos in 1988.

SN 1987A was a supernova in the outskirts of the Tarantula Nebula in the Large Magellanic Cloud, a nearby dwarf galaxy.

It was the closest observed supernova since, which occurred in the Milky Way itself.

As it was the first supernova discovered in 1987, it was labeled " 1987A ".

It was the first opportunity for modern astronomers to see a supernova up close and observations have provided much insight into core-collapse supernovae.

Voyager 2, then en route to Neptune, was able to observe the supernova with its cameras.

Supernova 1987a — the nearest supernova in recent years — was also located in the Large Magellanic Cloud.

Supernova 1604, also known as Kepler's Supernova, Kepler's Nova or Kepler's Star, was a supernova that occurred in the Milky Way, in the constellation Ophiuchus.