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

   spaceplace.nasa.gov › light-year › en

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   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. www.sciencecentres.org.uk › documents › 635So, what is a light year? - sciencecentres.org.uk

   www.sciencecentres.org.uk › documents › 635

   1 light year is: 5.9 trillion miles (5.9 x 1012, 5900000000000) 9.7 trillion kilometres (9.7 x 1012, 9700000000000) The fastest thing in the Universe. Light travels at a speed of 3 x 108 metres per second (300 000 000) in the vacuum of space (and not much slower through the air here on Earth).

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

   sciencenotes.org › what-is-a-light-year-definition-and-examples

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   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.astroleague.org › wp-content › uploadsUnderstanding the Light-Year (ly)

   www.astroleague.org › wp-content › uploads

   A light-year is a unit expressing distance, not time. Understanding the Light-Year (ly) One light-year equals the distance that light travels through a vacuum in one year: about 5.9 trillion miles (or about 9.5 trillion km) Distance to the Moon = 1.25 light–seconds. ... another 498 light-seconds (or 8.3 minutes) to the Sun.

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

   sentinelmission.org › astronomical-units-measurements-glossary › light-year

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   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.

6. science.nasa.gov › exoplanets › what-is-a-light-yearWhat is a light-year? - NASA Science

   science.nasa.gov › exoplanets › what-is-a-light-year

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   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.

7. mkscienceset.com › articles_file › 430-_article1705667356The Light-Year

   mkscienceset.com › articles_file › 430-_article1705667356

   A light-year is a large unit of length used to express astronomical distances. As defined by the International Astronomical Union (IAU), a light-year is the distance light travels in space in one Julian year. Since it includes the chronometric word “year,” the term light-year is misused sometimes interpreted as a unit of time. The light ...