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Object |
Corresponds roughly to the class of ordinary objects. Examples include normal physical objects, geographical regions, and locations of Processes, the complement of Objects in the Physical class. In a 4D ontology, an Object is something whose spatiotemporal extent is thought of as dividing into spatial parts roughly parallel to the time-axis.
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Meteoroid | According to the International Astronomical Union, a Meteoroid is a solid object moving in interplanetary space, of a size considerably smaller than an asteroid and considerably larger than an atom. |
| | NaturalSatellite | NaturalSatellite is the class of large, naturally occurring astronomical bodies orbiting some other AstronomicalBody. |
| | Satellite | Satellite is the collection of bodies that revolve around some astronomical body, e.g., planets around a star. This class includes both artificial and NaturalSatellites. |
| | Star | Star is the class of hot gaseous astronomical bodies. |