Binary
Two stars orbiting one another are in a Binary System
Binary
Natural objects that orbit a star form that star's solar system. The name comes from the name of our star, which is Sol. Earth is part of the Solar System. Another star's system might be referred to by the name of that star, as in the Polaris System.
Dwarf stars.
Orbital x ray
The stars are said to be a "gravitational binary pair"
The name of our system, the one the Earth is in, is called the Solar System after the name of the star we orbit, Sol.
"Main sequence" stars are no longer new, and are just cookin' along for millions of years. "Main sequence" stars, depending on their weight and whether they orbit another nearby star can get old and become red dwarfs, white dwarfs, black dwarfs, neutron stars, novas, or super-novas.
Meteors.
Another name for the circulatory system would be the cardiovascular system.
Another name for the circulatory system would be the cardiovascular system.
The Earth's Rotation if you are talking about its revolution around its primary axis,or the Earth's orbit around the sun.