apastron
“
The eccentricity of their orbit approaches in form that of Faye's comet, which travels round the Sun; consequently the stars, when at apastron, are twice their periastron distance.
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American Heritage Dictionary
Century Dictionary (1)
- In astronomy, that part in the orbit of a double star where it is furthest from its primary.
GNU Webster's 1913 (1)
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- The station was outward bound for the apastron of its shortened and cometary path. — Starfarers
- In this region, nearing apastron, no unusual velocity change was needed to alter orbit radically. — Starfarers
- They had already passed apastron and were downward bound. — Starfarers
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The eccentricity of their orbit approaches in form that of Faye's comet, which travels round the Sun; consequently the stars, when at apastron, are twice their periastron distance.
— The Astronomy of Milton's 'Paradise Lost' -
These orbs complete a revolution in 180 years, and when in apastron are seventeen times more remote from each other than when at periastron.
— The Astronomy of Milton's 'Paradise Lost'
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View all »Etymologies (2)
American Heritage Dictionary
Century Dictionary (1)
- New Latin, from Greek
ἀπό , from, +ἂστρον , star: see aster.