4.46 billion-year-old meteorite flew around in space before Earth was born
Approximately 4.5 billion years ago, the catastrophic explosion of a massive star, a supernova, caused an immense cloud of cosmic dust and gas to come together and form our solar system. But exactly how the planets were built remains somewhat of a mystery to scientists.
via FOX NEWS https://ift.tt/2OgwJih
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