Why Can't the Moon Always Pass Through the Center of the Umbra

question 17

Multiple Choice

Why can't the Moon always pass through the center of the umbra?

• A) The Moon's rotation is slightly faster than its revolution around Earth.
• B) The Moon's orbit is inclined by 5 degrees to the plane of Earth's orbit.
• C) The Moon's synodic cycle changes a few minutes per cycle.
• D) The Moon's orbit changes with the seasons.
• E) The Moon is not in its full moon lunar phase.