They are called lines of "latitude".
An invisible line that forms east-west circles around the Earth is called both parallel and line of latitude. An imaginary line that circles the earth from north to south is called both meridian and line of longitude.
You're thinking of 'parallels of constant latitude'.
Because they make big circles around the Earth.
They are called rings and the answer is Saturn.
sizing handles
The small square and circles around a selected graphic, are called sizing handles. To erase a character to the right of the insertion point, press the delete key.
Everywhere, it just circles around your it's called the circulatory system !
Yes, it has dozens of natural satellites, called moons.
There are hundreds of them- but the one that is not man made is called the Moon.
Close - they're called concentric circles.
It is called dark matter. Dark matter is undetectable and invisible.
concentric circles