Ch.02

• During an annular solar eclipse, ____________.

  the Moon is too far away from Earth to block the entire Sun
• Why doesn’t a total lunar eclipse occur every month?

  Sometimes the Moon is above or below Earth’s shadow during a full moon
• If the Moon’s orbit were not tilted with respect to the ecliptic, solar eclipses would occur ____________.

  once a month
• If you are watching a lunar eclipse in which the Moon is in Earth’s partial shadow, you will see ____________.


  the entire Moon, but slightly dimmer than normal
• At most times, Mars appears to move ______ relative to the stars. The exceptions are during its periods of apparent retrograde motion, when Mars appears to move _______ relative to the stars.

  eastward, westward