mascon: meaning, definition, pronunciation and examples
C2/TechnicalScientific/Technical
Quick answer
What does “mascon” mean?
A region of a planet's or moon's crust containing a large positive gravitational anomaly, indicating a concentration of dense mass below the surface.
Audio
Pronunciation
Definition
Meaning and Definition
A region of a planet's or moon's crust containing a large positive gravitational anomaly, indicating a concentration of dense mass below the surface.
In planetary science, a subsurface mass concentration, often associated with impact basins, where denser material from the mantle has risen or been concentrated, creating a local gravitational high.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage or meaning. The term is international scientific jargon.
Connotations
Purely technical, with no cultural or regional connotations.
Frequency
Extremely low frequency in general language, used only within specific scientific discourse.
Grammar
How to Use “mascon” in a Sentence
The [planetary body] has a mascon under the [basin name].Scientists identified a mascon using [gravitational data/seismic data].The mascon is thought to be composed of [dense material].Vocabulary
Collocations
Examples
Examples of “mascon” in a Sentence
adjective
British English
- mascon-related studies
- the mascon effect
American English
- mascon-related studies
- the mascon effect
Usage
Meaning in Context
Business
Not used.
Academic
Used in research papers and textbooks on planetary science, geophysics, and selenology.
Everyday
Virtually never used.
Technical
Core term in analysing spacecraft tracking data (e.g., from GRAIL, Lunar Reconnaissance Orbiter) to model subsurface structure.
Vocabulary
Synonyms of “mascon”
Strong
Neutral
Weak
Vocabulary
Antonyms of “mascon”
Watch out
Common Mistakes When Using “mascon”
- Using it as a verb (e.g., 'The material mascons there').
- Pronouncing it /ˈmeɪskən/.
- Using it to refer to any dense object, rather than a specific planetary science feature.
FAQ
Frequently Asked Questions
Rarely. The term was coined for lunar features. On Earth, similar subsurface mass concentrations are typically described as 'gravity highs' or 'positive Bouguer anomalies' in a geological context.
They were first identified in 1968 by a team of scientists at NASA's Jet Propulsion Laboratory, who analysed tracking data from the Lunar Orbiter missions.
They are primarily caused by the dense mantle material that uplifted into the crust following a giant impact, combined with the later flooding of the basin by dense basaltic lava (mare fill).
Yes, significantly. The uneven gravity from mascons can perturb the orbits of satellites around the Moon, requiring careful navigation and orbital adjustments.
A region of a planet's or moon's crust containing a large positive gravitational anomaly, indicating a concentration of dense mass below the surface.
Mascon is usually scientific/technical in register.
Mascon: in British English it is pronounced /ˈmæskɒn/, and in American English it is pronounced /ˈmæskɑːn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Imagine a MASSive CONcentration of rock under the moon's surface, making gravity stronger there.
Conceptual Metaphor
A hidden, dense tumour within the planetary body; a buried treasure of mass affecting the invisible force of gravity.
Practice
Quiz
What is a 'mascon' primarily associated with?