Question

Please Help!!

Answer 1

1) all of the above
2) rocketry
3) 1
4) not sure about this one because magnitude of one was the brightest then 2, then 3. 6 was the least brightest and 6+ or -1 or 0 or you could say, below 1 did not exist at that time..

Answer 2

Answer:

I think for 3 it is actually -1 but the rest is right

Explanation: