light-year

[US]/ˈlaɪtˌjɪə(r)/
[UK]/ˈlaɪtˌjɪr/

Translation

n.a unit of distance that light travels in one year, used especially in astronomy
Word Forms

Phrases & Collocations

light-year distance

measured in light-years

light-years away

several light-years

light-year scale

across light-years

light-year equivalent

travel light-years

light-years from

a light-year

Example Sentences

the star is several light-years away.

proxima centauri is the closest star to our sun, just over four light-years away.

scientists use light-years to measure vast distances in space.

traveling at the speed of light, it would still take years to cross a single light-year.

the exoplanet orbits a star 20 light-years from earth.

the andromeda galaxy is approximately 2.5 million light-years away.

a light-year is a unit of distance, not time.

the spacecraft would need many years to travel even one light-year.

the quasar's light has traveled billions of light-years to reach us.

understanding light-years helps grasp the scale of the universe.

the telescope can observe galaxies millions of light-years distant.

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