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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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     For most space objects, we use light-years to describe their...

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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. scaleofuniverse.com › en-gb › universeHow big is a Light-Year? | Scale of the Universe

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   A light-year is a measure of the incredible distance that light travels in a year. It’s a concept that helps us understand the vastness of space and the universe. Remember, the next time you look up at the stars, you’re seeing light that’s traveled trillions of miles to reach your eyes.

6. 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.

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

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   9 lip 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.