Question

if the moon crosses earth’s shadow at the center of the umbra, how long will the entire eclipse last from start to finish

Answer 1

About an hour and three-quarters.

Step-by-step explanation:

After about an hour, when the whole disk of the Moon is within the umbra, the eclipse becomes total (see video). If the Moon's path leads through the center of the umbra, the total eclipse can be expected to last about an hour and 3 quarters