Synonyms of light-year

light-year

noun

ˈlīt-ˌyir 

as in world

a huge physical or conceptual distance

my sister and I are close in age, but personality-wise, there are light-years between us

Synonyms & Similar Words

• world
• galaxy
• way
• long haul
• infinity
• country mile

Antonyms & Near Antonyms

• striking distance
• shouting distance
• inch
• hairbreadth
• hair
• hop, skip, and jump
• stone's throw

Example Sentences

Recent Examples of light-year

Rubin released its first images last year, including colorful shots of the Trifid and Lagoon nebulas located thousands of light-years from Earth. — Adithi Ramakrishnan, Los Angeles Times, 7 July 2026

About 11,000 light-years away from Earth, the supernova Cassiopeia A’s X-rays (seen above) are rendered in blue and purple, while infrared wavelengths are shown in red and white using data from JWST. — Andrew Paul, Popular Science, 2 July 2026

And like the photons that travel billions of light-years to reach us, new fragments are constantly falling into place. — Quanta Magazine, 2 July 2026

The Milky Way is our home galaxy with a disc of stars that spans more than 100,000 light-years. — Eric Lagatta, USA Today, 2 July 2026