Extraterrestrial Stone Found in Egypt May Be First Evidence on Earth of Rare Supernova - ScienceAlert

'Standard candle' (or type Ia) supernova explosions are some of the most energetic events in the Universe, happening when a dense white dwarf star subsumes another star. Now, scientists think they're found the first evidence on Earth of such a super

'Standard candle' (or type Ia) supernova explosions are some of the most energetic events in the Universe, happening when a dense white dwarf star subsumes another star. Now, scientists think they're… [+3525 chars]

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