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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 · For most space objects, we use light-years to describe their distance. A light-year is the distance light travels in one Earth year. One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it!

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  2. 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.

  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. 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, measuring...

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

    22 cze 2024 · Specifically, a light year is the distance that light travels in one Earth year. This might sound simple, but the implications of this definition are profound and far-reaching in the field of astronomy.

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

    13 maj 2024 · Light-year, in astronomy, the distance traveled by light moving in a vacuum in the course of one year, at its accepted velocity of 299,792,458 metres per second (186,282 miles per second). A light-year equals about 9.46073 × 1012 km (5.87863 × 1012 miles), or 63,241 astronomical units.