A Type II supernova or SNII[1] (plural: supernovae) results from the rapid collapse and violent explosion of a massive star. A star must have at least eight times, but no more than 40 to 50 …

SN 1987A was a type II supernova in the Large Magellanic Cloud, a dwarf satellite galaxy of the Milky Way. It occurred approximately 51.4 kiloparsecs (168,000 light-years) [a] from Earth and …

Dec 10, 2024 · Type II These supernovae occur at the end of a massive star's lifetime, when its nuclear fuel is exhausted and it is no longer supported by the release of nuclear energy. If the …

Nov 8, 2023 · Emerging from theories dating back to 1980, electron-capture supernovae, sometimes classified as Type III supernovae, are reserved for stars of 8 to 10 solar masses.

The supernovae of type II can also be sub-divided based on their spectra. While most type II supernovae show very broad emission lines which indicate expansion velocities of many …

Jun 19, 2023 · Type I supernova: A star accumulates matter from a nearby neighbor until a runaway nuclear reaction ignites. Type II supernova: A star runs out of nuclear fuel and …

Gravitational collapse converts gravitational potential energy into internal and thermal energy in the protoneutron star. This energy is the same as the Sun’s power output over 2500 Gyr. The …

In supernova: Type II supernovae. The so-called classic explosion, associated with Type II supernovae, has as progenitor a very massive star (a Population I star) of at least eight solar …

Recognised as a distinct type of supernova in the early 1940s, Type II (SNII) are characterised by hydrogen emission in their spectra, and light curve shapes that differ significantly from those of …

Type II supernovae have less sharp peaks at maxima and peak at about 1 billion solar luminosities. They die away more sharply than the Type I. Type II supernovae are not …