“First, the Earth stopped turning relative to the sun, and the moon parked itself on the dark side, a little outside the umbra.”

“If you were in a spaceship and you passed through the Earth's umbra you would not be able to see any part of the Sun.”

“The Moon can then pass through a part of the umbra and then there is a partial eclipse.”

“The fact that he could see the sunspots with the naked eye and that he could make out the umbrae and penumbrae of the spots suggest that they must have been extremely large.”

“The fact that the Worcester monk could apparently distinguish the umbrae and penumbrae of the sunspots shows his amazing eye for detail.”