It is called an eclipse.
In space, when one object blocks the light from reaching another object, a shadow is cast. This effect is similar to shadows on Earth, but in the vacuum of space, shadows can be more defined, especially when the background is bright, like a star or a planet. These shadows can provide important information about the shapes and positions of objects in space.
Satellite.
A shadow cast on one object in space on another is ECLIPSE
Any object that revolves around another object in space is called a satilite.
A satellite.
A satellite.
orbit
A satellite
They both happen when a space object blocks our "lights" from us.
satellite
an satellite
orbiting