One would usually refer to this object as a 'moon' or 'satellite'.
A ray that travels towards an object is known as an incident ray. It represents the path of light before it interacts with the object's surface.
Orbit
a round planet with living things on it.
Round object
A sphere.
The path along which a planet travels is called its orbit. Orbits are typically elliptical in shape, following the gravitational pull of the star around which they revolve.
The path along which a planet travels is called an orbit.
The technical name for the shape of the Earth is geoid. This is studied in the science of geodesy.
orbit
You have to find the name of your planet, which is often the name of the star it is going round with a small letter from b onwards. Taking the small letter away gives the name of the star. In the case of Earth (which is my planet) the star is called "Sol".
Planet Biyo is considered a planet because it meets the criteria set by the International Astronomical Union for planetary classification. It orbits the sun, has enough mass to be round due to gravity, and has cleared its orbit of other debris.
The path a revolving object moves along is called an orbit. The object revolves around a central point, such as a planet revolving around a star or a moon revolving around a planet.