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  1. spaceplace.nasa.gov › light-year › enWhat Is a Light-Year? - NASA Space Place

    9 lip 2024 · A light-year is the distance light travels in one Earth year. Learn about how we use light-years to measure the distance of objects in space.

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  2. thespacevortex.com › 2024 › 06What Is a Light Year? (With interactive calculator)

    22 cze 2024 · Discover what a light year is and why it's crucial for understanding the universe. Learn how this astronomical measure is calculated and how it helps us grasp cosmic distances.

  3. sciencenotes.org › what-is-a-light-year-definition-and-examplesWhat Is a Light Year? Definition and Examples - Science Notes and...

    28 maj 2020 · The light year (ly) is a unit of length that is the distance light travels in a vacuum in one Earth year. One light year is approximately 9.46 trillion kilometers (9.46 x 10 12 km) or 5.88 trillion miles (5.88 x 10 12 mi).

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

    22 gru 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...

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

    As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). [2] Because it includes the word "year", the term is sometimes misinterpreted as a unit of time.

  6. sentinelmission.org › astronomical-units-measurements-glossary › light-yearLight-Year - Definition & Detailed Explanation - Astronomical...

    24 mar 2024 · In space exploration, the concept of a light-year is used to plan missions to distant objects in our solar system and beyond. By knowing the distance to these objects in light-years, scientists can calculate the time it would take for a spacecraft to reach its destination.

  7. earthsky.org › space › what-is-a-light-yearWhat is a light year? Find out. | Sky Archive | EarthSky

    20 lut 2013 · A light-year is how astronomers measure distance in space. It’s defined by how far a beam of light travels in one year – a distance of six trillion miles. Think of it as the bigger,...