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)

B

Explanation:

A light-year is used for distance that the light has traveled for 1 year, so they saw the explosion in 1054 which means that it exploded back in the 5446, since it's 6500 light years away.

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;

ask an adult bc this is too hardcore