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In page Conjunction (astronomy):

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On July 5th, 1054 a supernova brighter than Venus appeared in the eastern part of constellation Taurus in the proximity of the waning crescent moon. The exact geocentric conjunction in right ascension took place at 07:58 UTC on this day with an angular separation of 3 degrees. It was perhaps the brightest star-like object in recorded history.[citation needed] The event is possibly shown on two petroglyphs in Arizona.