Exam 3: Eclipses and the Motion of the Moon

Earth and the Moon both move eastward in their orbits. Suppose the Moon moved westward instead, at the same rate as its actual eastward movement. What consequence would this have?

Which of the following investigations did the Ancient Greeks NOT carry out?

When does the third quarter moon rise? (You may want to examine Figure 3-2 of Universe, 11th ed., and think about where you would need to stand on Earth to see the third quarter moon rising.) ​

The Moon would NOT go through phases if:

How fast does the Moon move across our sky against the background of stars? (Hint: Through what angle does the Moon move around the sky in 1 month?)

In order to obtain the shadow lengths he did, Eratosthenes had to make his measurements on the:

When in total lunar eclipse, the Moon shows a reddish color because:

To observers on the near side of the Moon, Earth:

Is the Moon ever visible during the daytime (on a clear day)?

Approximately how long will it take for the dark-light dividing line on the Moon, the terminator, to move through 90° of lunar longitude?

During a total lunar eclipse (as viewed from Earth) you are standing on the Moon looking back at Earth. What do you see?

If the Moon in its orbit around Earth moves between Earth and the Sun and then 2 weeks later it moves to the other side of Earth as seen from the Sun, why then do we not see both a solar and a lunar eclipse every month?

One of the most significant achievements of the ancient Greeks was the:

How does the duration of a total solar eclipse compare with the duration of a total lunar eclipse?

The Moon moves eastward in its orbit. It always keeps the same face toward Earth. This means that it:

The saros is the period of time between:

Eratosthenes measured the radius of Earth by:

You travel to an exotic place to observe a total solar eclipse in December and someone on this trip tells you that the next eclipse to occur on Earth will be a lunar eclipse in March. Is this likely to be true?

The waning gibbous phase of the Moon occurs when the Moon passes:

Earth rotates eastward on its axis. The Moon moves to the east in its orbit around Earth. The Moon also rises about 1 hour later each night. Suppose the Moon moved westward instead. What consequence would this have?