Apsis
[[Coadan:Apogee (PSF) mul.svg|lang=zxx|thumb|345px|Ta ny h-apsissyn çheet er ny buill s'odjey (2) as s'niessey (3) ta [[corpane planaidagh]] cruinlee (2 as 3) roshtyn, as ad kianglt rish [[toshee (rollageydagh)|corpane toshee ny oastagh]] (1).]]

Ta '''apsis''' (voish {{lang|grc|''ἁψίς'' (hapsís)}} "aae" y [[Shenn Ghreagish|Çhenn Ghreagish]]) çheet er y voayl s'odjey ny s'niessey jeh [[corpane planaidagh]] 'sy [[cruinlagh|chruinlagh]] echey mygeayrt e [[toshee (rollageydys)|chorpane toshee]]. 
Ta '''linney ny h-apsissyn''' çheet er y linney ta kiangley yn daa [[kione-leagh|chione-leagh]].

Myr sampleyr, bentyn rish cruinlee mygeayrt y Ghrian, ta ny h-apsissyn enmyssit ''aphelion'' (y boayl s'odjey) as ''perihelion'' (y boayl s'niessey). Ta apsissyn yn Eayst jeant ass y voayl s'odjey, ''apogee'', as y boayl s'niessey, ''perigee'', jeh'n chruinlagh eck mygeayrt yn oastagh eck, y Chruinney. T'ad ''aphelion'' (y boayl s'odjey) as ''perihelion'' (y boayl s'niessey) yn daa apsis t'ec y Chruinney as ee cruinlaghey mygeayrt e oastagh, y Ghrian. Ta ny h-enmyssyn ''aphelion'' as ''perihelion'' currit rish cruinlee [[Jupiter]] as ny planaidyn elley, ny comaidyn, as ny roltagee ayns [[Corys ny Greiney]] bentyn rish nyn gruinlee mygeayrt nyn oastagh, y Ghrian.

[[Ronney:Cruinlee]]
Ta apsis (voish  "aae" y Çhenn Ghreagish) çheet er y voayl s'odjey ny s'niessey jeh corpane planaidagh 'sy chruinlagh echey mygeayrt e chorpane toshee. 
Ta linney ny h-apsissyn çheet er y linney ta kiangley yn daa chione-leagh.

Myr sampleyr, bentyn rish cruinlee mygeayrt y Ghrian, ta ny h-apsissyn enmyssit aphelion (y boayl s'odjey) as perihelion (y boayl s'niessey). Ta apsissyn yn Eayst jeant ass y voayl s'odjey, apogee, as y boayl s'niessey, perigee, jeh'n chruinlagh eck mygeayrt yn oastagh eck, y Chruinney. T'ad aphelion (y boayl s'odjey) as perihelion (y boayl s'niessey) yn daa apsis t'ec y Chruinney as ee cruinlaghey mygeayrt e oastagh, y Ghrian. Ta ny h-enmyssyn aphelion as perihelion currit rish cruinlee Jupiter as ny planaidyn elley, ny comaidyn, as ny roltagee ayns Corys ny Greiney bentyn rish nyn gruinlee mygeayrt nyn oastagh, y Ghrian.

Ronney:Cruinlee