(rare supernova in February 1987 visible by the naked eye)
SN 1987A is a 1987 Supernova in the
Large Magellanic Cloud, about 168000 light-years away,
whose light reached Earth on February 23, 1987.
Its maximum Apparent Magnitude was 3 in May 1987.
It has been much studied since.
It is considered a Core Collapse Supernova and
the remnants are studied to figure out the
workings of them. The remnant has much more
circular symmetry than spherical, suggesting the
progenitor star's spin was a factor.
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International Ultraviolet Explorer (IUE)
Supernova Remnant (SNR)