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1. spaceplace.nasa.gov › light-year › enWhat Is a Light-Year? - NASA Space Place

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

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   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.

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

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   22 gru 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...

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

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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.

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

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   22 cze 2024 · Discover what a light year is and why it's crucial for understanding the universe. Learn how this astronomical measure is calculated and how it helps us grasp cosmic distances.

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

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   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). A light year is a basic unit astronomers use to measure the vast distances in space.

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

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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).