black holes are the most mysterious objects in the universe. they re cloaked by a ven horizon. located 600 light years away in a galaxy called m87. another galaxy went viral when the massive phenomenon was shown. people around the world bought telescopes to see this massive amazement. number 4, in paris, it shocked the world. the notable notre dame cathedral is on fire. millions watched as flames engulfed the notre dame, the city s most historic cathedral. people screamed. it was so sad. people poured onto the streets to pray.