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

    13 cze 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. 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.

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

    As defined by the International Astronomical Union (IAU), the light-year is the product of the Julian year (365.25 days, as opposed to the 365.2425-day Gregorian year or the 365.24219-day Tropical year that both approximate) and the speed of light (299 792 458 m/s).

  4. www.explainingspace.com › how-long-would-it-take-to-travel-a-light-yearHow Long Would It Take To Travel A Light Year - Explaining Space

    23 lis 2022 · Imagine, even at this fast pace, it would still take 2,958 years to cover a distance of one light year, a testament to the vastness of space—approximately 5.88 trillion miles (9.46 trillion kilometers).

  5. 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 approximately 6...

  6. 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 is defined as distance light travels in a Julian year (365.25 days). This is slightly different from the Gregorian year (365.2425 days). The Gregorian year is the type of year most of the world uses, based on the Gregorian calendar.

  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 × 10 12 km (5.87863 × 10 12 miles), or 63,241 astronomical units.