Galaxy Nebula

A Galaxy Nebula in Universe Sandbox is a simulated object representing a cloud of gas, dust, and stars in a galaxy.

Properties Panel
The properties panel for a Galaxy Nebula object will include only a Nebula tab.

Characteristics
Galaxy Nebula objects have the following characteristics:
 * They are non-attracting objects, meaning that they do not exert a gravitational force on other objects in the simulation.
 * They are attracted objects, meaning that they feel the effects of gravity from other attracting objects in the simulation.
 * They have calculated orbital elements, and their orbit may be displayed.
 * They do not collide with other objects, instead passing right through them.
 * They experience nebula evolution, in which their nebula-specific properties evolve with time according to their position within the galaxy.