How many supernovas have been discovered?
Answers
Astronomers reckon there have been only three or four completely reliable observations of supernovae, in our Galaxy. The most reliable obsevations are those of the years 1054, 1572 and 1604.
Here is a nice summary, which suggests the “reliable” observations could be as high as eight.
a) A naked eye supernova was observed in 1987, but that was in a nearby “dwarf galaxy”.
b) I think it’s surprising that no supernovae have been seen in our Galaxy since the use of the telescope in astronomy. Galileo used a telescope for astronomical observations in 1609. That was just 5 years after the last supernova to be observed in our Galaxy (“Kepler’s star” of 1604). Unlucky!
There were just 32 years between the observation of a supernova by Tycho Brahe and the observation of another by Kepler. That was just a coincidence because Kepler’s star was about 10,000 light years further from us than Tycho’s star. Thus, Kepler’s star actually exploded about 10,000 years earlier than Tycho’s.
c) Amateur astronomers can do useful work in this area. The amateur Tom Boles has discovered well over a hundred supernovae.
d) Astronomers have found over ten thousand supernovae so far, with many new ones being discovered each year.
please mark this answer as brainliest