The first such observation was of SN 1885A in the Andromeda Galaxy.
Since 1885 the additional letter notation has been used, even if there was only one supernova discovered that year (e.g.
SN 1885A, SN 1907A, etc.)—this last happened with SN 1947A.
SN 1885A, SN 1907A, etc.)—this last happened with SN 1947A.
He stated: "Observations of stars in the first moments they begin exploding provide information that cannot be directly obtained in any other way." ==Discovery== Early work on what was originally believed to be simply a new category of novae was performed during the 1920s.
The word supernova was coined by Walter Baade and Fritz Zwicky in 1929. The most recent directly observed supernova in the Milky Way was Kepler's Supernova in 1604, but the remnants of more recent supernovae have been found.
The name "supernovae" is thought to have been coined by Walter Baade and Fritz Zwicky in lectures at Caltech during 1931.
It was used, as "super-Novae", in a journal paper published by Knut Lundmark in 1933, and in a 1934 paper by Baade and Zwicky.
It was used, as "super-Novae", in a journal paper published by Knut Lundmark in 1933, and in a 1934 paper by Baade and Zwicky.
By 1938, the hyphen had been lost and the modern name was in use.
American astronomers Rudolph Minkowski and Fritz Zwicky developed the modern supernova classification scheme beginning in 1941.
SN 1885A, SN 1907A, etc.)—this last happened with SN 1947A.
During the 1960s, astronomers found that the maximum intensities of supernovae could be used as standard candles, hence indicators of astronomical distances.
The most recent naked-eye supernova was SN 1987A, the explosion of a blue supergiant star in the Large Magellanic Cloud, a satellite of the Milky Way. Theoretical studies indicate that most supernovae are triggered by one of two basic mechanisms: the sudden re-ignition of nuclear fusion in a degenerate star such as a white dwarf, or the sudden gravitational collapse of a massive star's core.
Until 1987, two-letter designations were rarely needed; since 1988, however, they have been needed every year.
Until 1987, two-letter designations were rarely needed; since 1988, however, they have been needed every year.
Since 2000, professional and amateur astronomers have been finding several hundreds of supernovae each year (572 in 2007, 261 in 2008, 390 in 2009; 231 in 2013). Historical supernovae are known simply by the year they occurred: SN 185, SN 1006, SN 1054, SN 1572 (called Tycho's Nova) and SN 1604 (Kepler's Star).
Some of the most distant supernovae observed in 2003 appeared dimmer than expected.
Hence, for example, SN 2003C designates the third supernova reported in the year 2003.
The last supernova of 2005, SN 2005nc, was the 367th (14 × 26 + 3 = 367).
Since 2000, professional and amateur astronomers have been finding several hundreds of supernovae each year (572 in 2007, 261 in 2008, 390 in 2009; 231 in 2013). Historical supernovae are known simply by the year they occurred: SN 185, SN 1006, SN 1054, SN 1572 (called Tycho's Nova) and SN 1604 (Kepler's Star).
Since 2000, professional and amateur astronomers have been finding several hundreds of supernovae each year (572 in 2007, 261 in 2008, 390 in 2009; 231 in 2013). Historical supernovae are known simply by the year they occurred: SN 185, SN 1006, SN 1054, SN 1572 (called Tycho's Nova) and SN 1604 (Kepler's Star).
Since 2000, professional and amateur astronomers have been finding several hundreds of supernovae each year (572 in 2007, 261 in 2008, 390 in 2009; 231 in 2013). Historical supernovae are known simply by the year they occurred: SN 185, SN 1006, SN 1054, SN 1572 (called Tycho's Nova) and SN 1604 (Kepler's Star).
tidal disruption of a star by a black hole. Among the earliest detected since time of detonation, and for which the earliest spectra have been obtained (beginning at 6 hours after the actual explosion), is the type II SN 2013fs (iPTF13dqy) which was recorded 3 hours after the supernova event on 6 October 2013 by the Intermediate Palomar Transient Factory (iPTF).
Since 2000, professional and amateur astronomers have been finding several hundreds of supernovae each year (572 in 2007, 261 in 2008, 390 in 2009; 231 in 2013). Historical supernovae are known simply by the year they occurred: SN 185, SN 1006, SN 1054, SN 1572 (called Tycho's Nova) and SN 1604 (Kepler's Star).
It was first detected in June 2015 and peaked at , which is twice the bolometric luminosity of any other known supernova.
The star is located in a spiral galaxy named NGC 7610, 160 million light-years away in the constellation of Pegasus. On 20 September 2016, amateur astronomer Victor Buso from Rosario, Argentina was testing his telescope.
Since 2016, the increasing number of discoveries has regularly led to the additional use of three-digit designations. ==Classification== Astronomers classify supernovae according to their light curves and the absorption lines of different chemical elements that appear in their spectra.
All text is taken from Wikipedia. Text is available under the Creative Commons Attribution-ShareAlike License .
Page generated on 2021-08-05