astrometry: meaning, definition, pronunciation and examples
Very lowTechnical/scientific
Quick answer
What does “astrometry” mean?
the branch of astronomy that involves precise measurements of the positions and motions of stars and other celestial bodies.
Audio
Pronunciation
Definition
Meaning and Definition
the branch of astronomy that involves precise measurements of the positions and motions of stars and other celestial bodies
the science of making exact positional measurements of astronomical objects, often used for creating star catalogs, studying proper motions, determining parallaxes (and thus distances), and providing data for celestial mechanics and astrodynamics
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Minor variation possible in pronunciation.
Connotations
None; identical technical/scientific connotations in both varieties.
Frequency
Equally low frequency and confined to technical contexts in both varieties.
Grammar
How to Use “astrometry” in a Sentence
Astrometry of (object)Astrometry with (instrument)Astrometry from (location/satellite)Astrometry for (purpose)Vocabulary
Collocations
Examples
Examples of “astrometry” in a Sentence
adjective
British English
- The astrometric data were published in a new catalogue.
- They conducted an astrometric survey of the galactic centre.
American English
- The astrometric data were published in a new catalog.
- They conducted an astrometric survey of the galactic center.
Usage
Meaning in Context
Business
Not used
Academic
Used in astronomy, physics, and space science research papers, lectures, and textbooks.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in astronomy, satellite navigation (e.g., Gaia mission), and spacecraft guidance.
Vocabulary
Synonyms of “astrometry”
Neutral
Weak
Vocabulary
Antonyms of “astrometry”
Watch out
Common Mistakes When Using “astrometry”
- Misspelling as 'astromety' or 'astrommetry'.
- Confusing it with 'astrology'.
- Using it as a verb (e.g., 'to astrometry').
FAQ
Frequently Asked Questions
No. Astronomy is the broad science of celestial objects and phenomena. Astrometry is a specific subfield of astronomy concerned with precise measurement of positions and motions.
The European Space Agency's Gaia mission is a premier example. It scans the sky to measure the positions, distances, and motions of stars with unprecedented accuracy, creating a dynamic 3D map of the Milky Way.
It provides the fundamental reference frame for astronomy and navigation. Its data is crucial for calculating distances to stars, understanding stellar motions, detecting exoplanets, and guiding spacecraft.
Yes, ground-based telescopes have long performed astrometry. However, Earth's atmosphere blurs measurements. Space-based missions like Hipparcos and Gaia avoid this, achieving far greater precision.
the branch of astronomy that involves precise measurements of the positions and motions of stars and other celestial bodies.
Astrometry is usually technical/scientific in register.
Astrometry: in British English it is pronounced /əˈstrɒmətri/, and in American English it is pronounced /əˈstrɑːmətri/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: ASTRO (stars) + METRY (measurement) = measuring the stars.
Conceptual Metaphor
The sky as a measurable map or grid; celestial cartography.
Practice
Quiz
What is the primary focus of astrometry?