What astronomical object emerges sometimes from supernova instead of a black hole?
Magnetar
Blazar
Quasar
only a black hole can emerge from supernova
A magnetar is a type of neutron star with an extremely powerful magnetic field. The magnetic field decay powers the emission of high-energy electromagnetic radiation, particularly X-rays and gamma rays. As of March 2016, only 23 magnetars are known, with six more candidates awaiting confirmation.
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Answers by country
Magnetar
Blazar
Quasar
only a black hole can emerge from supernova
answers
the United States129
Pakistan18
Canada11
the United Kingdom63
Austria53
Australia21
India201
Germany416
Switzerland32
France10
Poland3703
Lebanon16
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Greece13