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

    3 de jun. de 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!

  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.

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

    A light-year is the distance light can travel in one year. Light is the fastest thing in our Universe traveling through interstellar space at 186,000 miles/second (300,000 km/sec). In one year, light can travel 5.88 trillion miles (9.46 trillion km).

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

    22 de dic. de 2021 · A light-year is a measure of astronomical distance: Light travels through a vacuum at precisely 983,571,056 feet (299,792,458 meters) per second, making a light-year approximately 6...

  6. 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). Because it includes the word "year", the term is sometimes misinterpreted as a unit of time.

  7. 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 de nov. de 2022 · NASA’s Juno spacecraft showcases incredible speed, hitting 165,000 mph (365,000 kmph). 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).

  8. science.nasa.gov › solar-system › cosmic-distancesCosmic Distances - NASA Science

    18 de may. de 2020 · For much greater distances — interstellar distances — astronomers use light years. A light year is the distance a photon of light travels in one year, which is about 6 trillion miles (9 trillion kilometers, or 63,000 AU).