From 1400 BC to AD 1600, China recorded around 90 novas. Among them the supernova SN1054 [See Link] was the first supernova confirmed by modern radio astronomers. A British astronomer in 1731, discovered an oblong cloud"" over China. After observation, calculation and analysis by several astronomers, it was proved that the crab shaped nebula found in this position was the ruins of a supernova that had shot out of a dense cluster some 900 years previously. i.e. the year of 1054. This discovery was one of the most significant astronomical findings in the 1960s.
It is precisely the supernovae that created those elements and dispersed them into space.It is precisely the supernovae that created those elements and dispersed them into space.It is precisely the supernovae that created those elements and dispersed them into space.It is precisely the supernovae that created those elements and dispersed them into space.
The name is formed from SN (yes SuperNova), the year of discovery, then followed by a one or two letter designation. SN is optional.The first 26 of the year get designated with an upper case letter from A to Z. then, pairs of lowercase letters are used, starting with aa, ab.... etcetera Historical supernovae were known simply by the year they occurred: SN185, SN1572 SN1604. Since 1885, the letter notation was used.
Since supernovas can be observed from earth with the naked eye they have been observed in prehistory (some archeaologists believe that ancient wall paintings depict supernovae) However the first person to ever record one was in 185BC by Chinese and Islamic observers.
supernovae are classified by the lines in their spectra (which indicate which elements are present). type I supernovae have no hydrogen lines, having been caused by the explosion of a star with no hydrogen envelope. type II supernovae have hydrogen lines, indicating that the exploding progenitor star had retained a significant amount of its hydrogen before its supernova. type I supernovae are further classified based on the presence of silicon lines, which are present in type Ia supernovae but not types Ib and Ic.
They were formed in supernovae.
"Supernovae" is a plural form of "supernova"
It is precisely the supernovae that created those elements and dispersed them into space.It is precisely the supernovae that created those elements and dispersed them into space.It is precisely the supernovae that created those elements and dispersed them into space.It is precisely the supernovae that created those elements and dispersed them into space.
The name is formed from SN (yes SuperNova), the year of discovery, then followed by a one or two letter designation. SN is optional.The first 26 of the year get designated with an upper case letter from A to Z. then, pairs of lowercase letters are used, starting with aa, ab.... etcetera Historical supernovae were known simply by the year they occurred: SN185, SN1572 SN1604. Since 1885, the letter notation was used.
Since supernovas can be observed from earth with the naked eye they have been observed in prehistory (some archeaologists believe that ancient wall paintings depict supernovae) However the first person to ever record one was in 185BC by Chinese and Islamic observers.
supernovae are classified by the lines in their spectra (which indicate which elements are present). type I supernovae have no hydrogen lines, having been caused by the explosion of a star with no hydrogen envelope. type II supernovae have hydrogen lines, indicating that the exploding progenitor star had retained a significant amount of its hydrogen before its supernova. type I supernovae are further classified based on the presence of silicon lines, which are present in type Ia supernovae but not types Ib and Ic.
Black holes do not create supernovae. Black holes are created from a supernovae.
Supernovae are massive explosions that occur when a star uses up its gas and explodes so they will only occur once a star has died.
supernovae
See related questions
"explode as supernovae". These are called Type II supernovae and sometimes a neutron star is formed, not a black hole.
They were formed in supernovae.
Where: In supernovae. How: by nuclear fusion.