The equator or any line of longitude or meridian.
The imaginary line that circles the middle of the earth is called the equator.
prime meridian
The Equator.
The veritical lines that run across the earth are latitude. The horazontal line that runs across the earth is the equator.
The imaginary line defined as zero latitude is usually referred to as the 'Equator'.
The imaginary line that circles the middle of the earth is called the equator.
Equator...
equator comes to mind
the axis
the equator
The axis.
axis
The axis.
The equator
axis
It's called the earth's axis.
The equator