Important days in history of universe

July 4th was a significant day long before America started celebrating it. It also marks the first time on record that a new object appeared in the constellation Taurus — an object so bright it could be seen in the daytime sky. Not surprisingly, people around the world couldn’t help but take notice. Chinese astronomers labeled it a “guest star” and noted that, at night, it shone almost four times brighter than Venus.
http://rss.cnn.com/~r/rss/cnn_tech/~3/209439353/index.html (http://rss.cnn.com/~r/rss/cnn_tech/~3/209439353/index.html).