apastron: meaning, definition, pronunciation and examples
Very Rare / SpecializedTechnical / Scientific
Quick answer
What does “apastron” mean?
The point in the orbit of a star, or other celestial body, around another star where they are at their greatest distance from each other.
Audio
Pronunciation
Definition
Meaning and Definition
The point in the orbit of a star, or other celestial body, around another star where they are at their greatest distance from each other.
In astronomy, the point of greatest separation between two bodies in a binary star system during their mutual orbit, analogous to aphelion (for orbits around the Sun) or apogee (for orbits around Earth).
Dialectal Variation
British vs American Usage
Differences
No differences in meaning or usage. Spelling is identical.
Connotations
Purely technical with no cultural connotations.
Frequency
Extremely rare in both dialects, used exclusively in specialized academic or professional contexts.
Grammar
How to Use “apastron” in a Sentence
The [celestial body] reaches apastron.At apastron, the [property] is [value].The apastron of [Binary System] is [distance].Vocabulary
Collocations
Examples
Examples of “apastron” in a Sentence
adjective
British English
- The apastron distance was calculated.
- The apastron passage occurred in 2021.
American English
- The apastron separation is immense.
- They studied the system's apastron phase.
Usage
Meaning in Context
Business
Not used.
Academic
Used in astrophysics, astronomy, and related scientific papers and textbooks.
Everyday
Never used in everyday conversation.
Technical
Core term in orbital mechanics for binary star systems.
Vocabulary
Synonyms of “apastron”
Neutral
Weak
Vocabulary
Antonyms of “apastron”
Watch out
Common Mistakes When Using “apastron”
- Mispronouncing the first syllable as 'ape-' or 'appa-'.
- Confusing it with 'periastron'.
- Using it for orbits around planets (incorrect; use 'apogee').
- Misspelling as 'apastrum' or 'apastronom'.
FAQ
Frequently Asked Questions
No, it is a highly specialized term used almost exclusively in astrophysics and astronomy.
The opposite is 'periastron', which is the point of closest approach in an orbit around a star.
No. For an orbit around Earth, the equivalent point is called 'apogee'. 'Apastron' is specific to orbits where the primary body is a star.
In British English, it is typically /əˈpæstrən/. In American English, it can be /əˈpæstrɑːn/ or /æˈpæstrən/. The stress is on the second syllable.
The point in the orbit of a star, or other celestial body, around another star where they are at their greatest distance from each other.
Apastron is usually technical / scientific in register.
Learning
Memory Aids
Mnemonic
Think 'APOstron' like 'APOgee' (far from Earth) but for a STaR – the point farthest from the star.
Conceptual Metaphor
ORBIT AS A JOURNEY (The 'apastron' is the most distant landmark or destination on the orbital journey around the primary star.)
Practice
Quiz
What is the primary context for using the word 'apastron'?