Difference (from prior major revision)
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Changed: 14c14
* 1054, a star is seen to explode and become a powerful supernova that can be seen in daylight. The remains of the supernova are now known as the [Crab Nebula]?.
* 1054, a powerful supernova is observed. It was so bright that could be seen in daylight. The [supernova remanent]? left by the event is now known as the [Crab Nebula]?.