When the Southern Hemisphere is having fall, the Northern Hemisphere is having
The imaginary vertical line that cuts through the center of the Earth
Earth's oval-shaped orbit around the Sun
How many days are in a leap year?
What hemisphere do we live in?
The shape of the lighted part of the moon as seen from Earth
Having an increasing portion of its surface illuminated
Having a decreasing portion of its surface illuminated
An eclipse of the moon
An eclipse of the sun
An eclipse that completely blocks our view of an object in space such as the moon or the sun
An eclipse that partly blocks our view of an object in space such as the moon or the sun
Spring, summer, fall, or winter
Spinning of Earth on its imaginary axis, which takes 24 hours to complete
Earth's year-long elliptical orbit around the sun
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