An accretion disk is heated by friction and compression, both of which are greater for material falling into a compact object as the material is forced into a smaller space. The hottest accretion disks would be found around black holes.
It is said to be orbiting the central object.
Yes. Think of it like this, and object, orbiting an object, orbiting an object, orbiting an object. If Earth can orbit the sun with the moon still orbiting the Earth, then what keeps a moon from orbiting our moon? Size and distance. Yes, in theory, but very unlikely to be a stable system.
It sounds like a planet to me.
Well it is orbiting and it is caused by gravity, centripetal and centrifugal forces
During accretion, any object falling towards a planet will acquire a velocity because of the gravitational attraction from the planet. So, the object will have a kinetic energy due to its motion. During the the collision the kinetic energy is converted to heat energy, and the remain of this heat is actually heating the planet.
First the object get faraway more and more, and step by step when it is getting far, it is not more orbiting, so we cannot say that it is a orbiting object now,but it is wandering object.
Orbiting
Orbit
a satellite
It is said to be orbiting the central object.
orbiting
orbiting the sun
raditon
Yes. Think of it like this, and object, orbiting an object, orbiting an object, orbiting an object. If Earth can orbit the sun with the moon still orbiting the Earth, then what keeps a moon from orbiting our moon? Size and distance. Yes, in theory, but very unlikely to be a stable system.
An orbiting body is know as a satellite.
Anything in "orbit" is falling into the object that its orbiting ... and constantly missing. Because by the time the (orbiting) object has fallen far enough to hit ... the object it is orbiting has moved far enough so that they miss each other.
The object is orbiting round the other object.