The crab nebula is the remnant of an exploded star. the explosion was witnessed by chinese astronomers in the year 1054 ce. the crab nebula is 6500 ly away. this means the explosion occurred in what year? a.6500 bce b. 5446 bce c. 1054 bce d. 1054 ce ( explain reasoning)

Take a guess im getting rid of my account might as well do it in style a fishing boat, with a ladder in it, is leaning against a wall at the harbor. there are 5 oars and 2 fishing nets in the trawler. the distance between two consecutive steps on the ladder is 1 meter. if waves lashing against the wall rise a half meter in every half hour, how long will it take before 6 steps of the ladder are under the waves?

The formation of the planet uranus is estimated to have occurred approximately when?

Select the natural regions. delta denver forest georgia north america plateau stream