The very center is the Double Bulls eye, and the small ring around it is the Bulls eye.
The center of a adom is called the nucleus
The center of a typhoon is called the eye.
The center of an atom is called the nucleus.
The center of the planet is called the "core."
The center of an atom is called a nucleus (nucleifor plural).Center of an atom is called the "Nucleus".
It is called the yolk.
The center of the cell is usually called the nucleus.
The center region is called the eye.
Sometimes it is also called a "bull"The center of a target is called the bullseye.
An area remote from the center called the outskirts.
the center of a circumscribed circle is called the focus.
The center of a wheel is generally called a hub.