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

    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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      Tsunami is a Japanese word that means "harbor wave." It is a...

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      Space Communications and Navigation Kids Zone This link...

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      How far apart? To see for yourself how far apart Earth and...

    • What is a Galaxy

      The Hubble Space Telescope looked at a small patch of space...

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

    22 cze 2024 · A light year is the distance light travels in one year, which is about 31,557,600 light seconds. How many light years across is the Milky Way? The Milky Way galaxy is estimated to be about 100,000 light years in diameter.

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

    22 gru 2021 · A light-year is the distance a beam of light travels in a single Earth year, which equates to approximately 6 trillion miles (9.7 trillion kilometers). On the scale of the universe,...

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

    28 maj 2020 · Get the definition of a light year in astronomy. See examples of distances in light years and how the unit compares with parsecs and AU.

  5. 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.

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

    24 mar 2024 · The concept of a light-year is crucial in astronomy as it allows astronomers to measure vast distances in space. By using light-years as a unit of measurement, astronomers can accurately describe the distances between stars, galaxies, and other celestial objects.

  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, badder cousin...