There are about 40 to 50 of neutrinos released by the collapse of a supernova. This is known as a massive star.
Supernova was released on 01/14/2000.
A massive red supergiant star will eventually explode as Type II supernova. That happens when the high mass star has run out of its nuclear "fuel". A series of nuclear fusion reactions finally ends at the nucleus of iron. A massive core of iron remains and iron can't be used to produce energy by nuclear fusion. The core collapses under gravity and the energy released throws the outer layers of the star into space in a supernova explosion. This is a Type II supernova. Sometimes it's referred to as a "core collapse" supernova, for obvious reasons. A bit more detail, if needed: A "high mass star" in this context is one with a mass of at least 8 times the mass the Sun. They develop into red supergiant stars. The mass of the iron core needs to be over the "Chandrasekhar mass" of about 1.4 times the Sun's mass. A core of that mass is unable to resist gravitational collapse. Depending on the mass of the iron core, collapse may stop at a "neutron star". Otherwise there is a complete collapse to a "black hole". See "Sources and related links", below.
Blueprints for Collapse - 2009 was released on: USA: June 2009
Rock Star Supernova - 2006 1-3 was released on: USA: 11 July 2006
Rock Star Supernova - 2006 1-4 was released on: USA: 12 July 2006
Dance Dance Revolution Supernova - 2006 VG was released on: USA: 15 May 2006
Big History - 2013 Silver Supernova - 1.15 was released on: USA: 21 December 2013
Rock Star Supernova - 2006 1-2 was released on: USA: 6 July 2006
Rainfall Collapse - 2010 was released on: USA: 3 May 2010
Worlds Collapse - 2014 was released on: USA: 22 August 2014
Sn 2006gy [See Link] was observed on May 7, 2007, by NASA and several other astronomers who described it as the "brightest stellar explosion ever recorded.The kinetic energy released by the explosion has been estimated at 1052 ergs (1045 J)
Rock Star Supernova - 2006 Finale 2-11 was released on: USA: 13 September 2006