E0102, short for 1E 0102.2-7219, is the remnant of a supernova that exploded in the Small Magellanic Cloud, a neighbouring galaxy of the Milky Way. The supernova was caused when a star much more massive than the Sun collapsed under its own gravity.

Constellation: Tucana

Distance: 190,000 ly

Declination: -72° 01' 55.7