Astronomy View all facts Glossary Help| Astronomy View all facts Glossary Help |
| physical object > natural object |
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| natural object comparison table | ||||||
| Subject | has spectra | has definition | has frequency | has charge | has wavelength | obey |
|---|---|---|---|---|---|---|
| celestial body | natural object visible in the sky | |||||
| collection of particles | ||||||
| particle | Fundamental unit of matter and energy. All may be classed as fermions, which have half-integral spin and obey the exclusion principle, and bosons, which have integral spin and do not obey the exclusion principle. The term particle is metaphoric, in that all subatomic particles also evince aspects of wave-like behavior. | inversely proportional to the wavelength | inversely proportional to its momentum | uncertainty principle | ||
| theoretical celestial body | natural object postulated by theory but not yet observed |
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