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  1. en.wikipedia.org › wiki › Light-yearLight-year - Wikipedia

    A light-year, alternatively spelled light year (ly), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730,472,580.8 km (Scientific notation: 9.4607304725808 × 10 12 km), which is approximately 5.88 trillion mi.

  2. spaceplace.nasa.gov › light-year › enWhat Is a Light-Year? | NASA Space Place – NASA Science for Kids

    13. Juni 2024 · A light-year is the distance light travels in one Earth year, about 6 trillion miles. Learn how we use light-years to measure the distance of objects in space and how they relate to time and space.

  3. science.nasa.gov › exoplanets › what-is-a-light-yearWhat is a light-year? - NASA Science

    Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year. We use light-time to measure the vast distances of space.

  4. Bilder

    • Units Of Distance In Astronomy: Light Year, Parsec And AU
    • What is a light-year?
    • What is a Light Year? | Illustrated Guide to Astronomy
    • How long is a light-year?

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  5. www.space.com › light-yearWhat is a light-year? | Space

    22. Dez. 2021 · A light-year is a measurement of distance and not time (as the name might imply). A light-year is the distance a beam of light travels in a single Earth year, which equates to...

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  6. de.wikipedia.org › wiki › LichtjahrLichtjahr – Wikipedia

    Ein Lichtjahr ist laut der Internationalen Astronomischen Union (IAU) definiert als die Strecke, die eine elektromagnetische Welle wie das Licht in einem julianischen Jahr im Vakuum zurücklegt. Es gibt mehrere Definitionen für ein Jahr.

  7. astrobackyard.com › light-yearHow Far is a Light Year? | The Fastest Thing in the Universe

    Learn what a light-year is, how astronomers use it to measure vast distances in space, and how light shows us the past. Find out how far away the Moon, the Sun, the nearest stars and galaxies are in light-years.

  8. www.britannica.com › science › light-yearLight-year | Distance, Measurement, Time | Britannica

    13. Mai 2024 · A light-year is the distance light travels in one year in a vacuum. Learn how to calculate it, how it relates to other units of time and distance, and its origin and history.