Noun
The word is derived from aphelion
of Aphelion
Source: Webster's dictionaryHe calculated, based on the fact that four comets possessed aphelia at around 100 AU and a further six with aphelia clustered at around 300 AU, the orbital elements of a pair of hypothetical trans-Neptunian planets. Source: Internet
Some scholars theorise that the galactic tide may have contributed to the formation of the Oort cloud by increasing the perihelia (smallest distances to the Sun) of planetesimals with large aphelia (largest distances to the Sun). Source: Internet
Most scattered disc objects (SDOs) have perihelia within the Kuiper belt but aphelia far beyond it (some more than 150 AU from the Sun). Source: Internet
The scattered disc extends to the right, far beyond the diagram, with known objects at mean distances beyond 500 AU ( Sedna ) and aphelia beyond 1000 AU ( (87269) 2000 OO 0.3em ). Source: Internet