English: ASASSN-15lh is the most luminous supernova-like object ever observed 3,800 million ly away in the constellation Indus - Hosted by an old, red, larger and more luminous than the Milky Way galaxy - At its brightest, it was 50 times more luminous than the whole Milky Way galaxy and 70,000 times as wide as the Sun - The exact nature of this explosion is still disputed between a supernova, tidal disruption, gravitational lensing, a quark nova or a rapid magnetar -
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