Encyclopedia: SN1...
Encyclopedia : S : SN : SN1 (13 articles)
SN1 reaction
The SN1 reaction is a substitution reaction in organic chemistry. "SN" stands for substitution nucleophilic and the "1" represents the fact that the rate-determining step is unimolecular. It involves a carbocation intermediate, and it is commonly seen in reactions of secondary or tertiary alkyl ha..
SN 1006
Supernova SN 1006 |- | Host Galaxy | Milky Way |- | Constellation | Lupus |- | Right ascension | 15h 2m8s |- | Declination | -41° 57′ |- | Galacticcoordinates | G.327.6+14.6 |- | Discovery Date | May 1, 1006 UTC |- | Peak magnitude (V) | -7.5 |- ! style="background-color: #ABCDEF;" cols..
SN 1054
Supernova SN 1054 |- | Progenitor type | |- | Colour (B-V) | |- | Notable features | |} SN 1054 was a supernova that was widely seen on Earth in the year 1054. It was recorded by Chinese and Arab astronomers as being bright enough to see in daylight for 23 days and was visible in the night..
SN 1181
Supernova SN 1181 |- | Host Galaxy | Milky Way |- | Constellation | Cassiopeia |- | Right ascension | 2h 2m |- | Declination | +64° 37′ |- | Galacticcoordinates | |- | Discovery Date | 1181 UTC |- | Peak magnitude (V) | -1? |- ! style="background-color: #ABCDEF;" colspan="2" | Physical..
SN 1572
Supernova SN 1572 |- | Progenitor type | |- | Colour (B-V) | |- | Notable features | |} X-ray image of the expanding cloud of debris and high energy electrons from Tycho's supernova. SN 1572 or Tycho's Nova was a supernova in the constellation Cassiopeia, one of the eight supernovae ..
SN 1604
SN 1604 |- | Progenitor type | |- | Colour (B-V) | |- | Notable features | Last observed supernovain our galaxy.Maintained naked-eye visibility for 18 months. |} Supernova 1604, also known as Kepler's Supernova or Kepler's Star, was a supernova in the Milky Way, in the constellation Ophiuchu..
SN 1986G
SN 1986G |- | Progenitor type | |- | Colour (B-V) | |- | Notable features | Only SN in NGC 5128 (so far!) |} SN 1986G was a supernova that was observed on May 3 1986 by Robert Evans. It's host galaxy was Centaurus A about 15 million light-years away in the constellation Centaurus. Since C..
SN 1987A
SN 1987A |- | Progenitor type | |- | Colour (B-V) | |- | Notable features | The closest recorded sn.since invention of telescope |} SN 1987A was a supernova in the outskirts of the Tarantula Nebula in the Large Magellanic Cloud, a nearby dwarf galaxy. It occurred approximately 51.4 kilopars..
SN 1994D
SN 1994D |- | Progenitor type | |- | Colour (B-V) | |- | Notable features | ? |} Supernova 1994D was a Type Ia supernova in the outskirts of galaxy NGC 4526. As the name indicates, it was discovered in 1994 by Treffers, Filippenko, Van Dyk, and Richmond. External links [Isaac Newton..
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