ELECTRON-CAPTURE SUPERNOVAE

BY NUMBERS

8-10x

Progenitor is eight to ten times more massive than the Sun

2018

Year SN 2018zd was first detected

31,000,000

Distance of SN 2018zd, in light years, from Earth

TWO

Supernovae observed so far: SN 2018zd and SN 1054

967

Years since SN 1054 was observed

23

Number of days SN 1054 was shining bright

1980

The year Nomoto predicted electron-capture supernovae

SIX

Theorised indicators of an electron-capture supernova

200

Number of people involved in the Global Supernova Project

1731

Year the Crab Nebula was first identified