| NOUN | quantity | astronomy unit | a linear unit used for astronomical distances |
|---|
| Meaning | A linear unit used for astronomical distances. | |
|---|---|---|
| Narrower | Astronomical Unit, AU | A unit of length used for distances within the solar system |
| light hour | The distance light travels in a vacuum in one hour | |
| light minute | The distance light travels in a vacuum in one minute | |
| light second | The distance light travels in a vacuum in one second | |
| light year, light-year | The distance that light travels in a vacuum in 1 year | |
| parsec, secpar | A unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc | |
| Broader | linear unit, linear measure | A unit of measurement of length |
| Spanish | unidad astronómica | |
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