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ⓘ Supernovae ..




                                               

Supernova

A supernova is the explosion of a giant star. It usually happens when its nuclear fusion cannot hold the core against its own gravity. The core collapses, and explodes. The biggest stars that make supernovae are hypergiants and smaller ones are supergiants. They are massive: because of gravity, they use up their energy very quickly. Normally they only live for a few million years. During the explosion, the total energy radiated by supernovae may briefly outshine the entire output of a galaxy. They emit energy equal to that of the whole lifetime of a solar-like star. The explosion blows off ...

                                               

ASASSN-15lh

ASASSN-15lh is a supernova detected on 14 June 2015. It is the most luminous supernova ever detected. At its brightest it was 50 times brighter than the whole Milky Way. "The exploding star was first observed back in June last year but is still radiating vast amounts of energy. At its peak, the event was 200 times more powerful than a typical supernova, making it shine with 570 billion times the brightness of our Sun. Researchers think the explosion and ongoing activity have been boosted by a very dense, highly magnetised, remnant object called a magnetar. This object, created as the super ...

                                               

Keplers Supernova

SN 1604 was a supernova seen in 1604. It was seen in the constellation Ophiuchus. SN 1604 is sometimes called Keplers Nova or Keplers Supernova or Keplers Star since Johannes Kepler studied it. SN 1604 is the last supernova to have been seen in our galaxy.

                                               

SN 1987A

SN 1987A was a supernova in a small galaxy that is orbiting our Milky Way galaxy. The supernova was 168.000 light years away, and so happened 168.000 years ago. But it was 1987 when it was first seen. It was close enough that scientists found neutrinos before the light got to Earth. SN 1987A is the only supernova that has been that close in modern times, It was the brightest object seen from Earth in over 400 years. There have been many others that were closer but they were before scientists had the tools to help them understand what was happening. "Scientists believe theyve finally tracke ...

                                               

SN 1994D

SN 1994D was a Type IA supernova near the NGC 4526 galaxy. It was discovered in 1994 by Treffers, Filippenko, Van Dyk, and Richmond using an observatory at San Francisco State University.

                                               

Type Ia supernova

A type Ia supernova is a type of supernova that occurs in binary systems in which one of the stars is a white dwarf. The other star can be anything from a giant star to an even smaller white dwarf. Physically, carbon-oxygen white dwarfs with slow rotation are limited to below 1.44 solar masses. Since type Ia supernovae have a known brightness they can be used as standard candles to determine the distance to a galaxy once the stretch-factor is accounted for. When a runaway thermonuclear explosion rips through a white dwarf star and blows the star to bits, it is called a type 1a supernova. T ...

                                     

ⓘ Supernovae

  • gravity. The core collapses, and explodes. The biggest stars that make supernovae are hypergiants and smaller ones are supergiants. They are massive: because
  • how many supernovae happened in the galaxy. The supernovae in this galaxy occur very frequently. In the last century a total of 9 supernovae were seen
  • the interstellar medium. Type 1a supernovae are several times more luminous than type Ib, Ic, and type II supernovae They leave no core remnant behind
  • Space Telescope Science Institute. He is known for his research in using supernovae as cosmological probes. Riess shared both the 2006 Shaw Prize in Astronomy
  • were formed in or after the Big Bang, by nucleosynthesis in stars and supernovae or by being hit by cosmic rays. Only 286 primordial nuclides are known
  • indicate that Type Ia supernovae that are of known distance have the same brightness, but it s possible that distant Type Ia supernovae have different properties
  • variables: stars which undergo a cataclysmic change, such as novae and supernovae Classical Cepheids include: Eta Aquilae, Zeta Geminorum, Beta Doradus
  • supernova of Type Ia in the constellation Cassiopeia. It is one of eight supernovae visible to the naked eye in historical records. It appeared in early November
  • Both galaxies were discovered by John Herschel in 1835. So far four supernovae have been observed in NGC 2207. NGC 2207 is in the process of stripping
  • make explosions, such as lightning, volcanic eruptions, meteors, and supernovae People make explosions mostly by using chemical explosive materials.