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

   science.nasa.gov › solar-system › cosmic-distances

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   18 maj 2020 · This animated video illustrates how far a light second, minute and year are. NASA-JPL-Caltech. 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).

   • What is a light-year? - NASA Science

     Keep Exploring. Light-year is the distance light travels in...

2. 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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   6 maj 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! Looking Back in Time. When we use powerful telescopes to look at distant objects in space, we are actually looking ...

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

   en.wikipedia.org › wiki › Light-year

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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: 94,607.304725808 x 10 8 km) , which is approximately 5.88 trillion mi.

4. solarsystem.nasa.gov › planets › earthIn Depth | Earth – NASA Solar System Exploration

   solarsystem.nasa.gov › planets › earth

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   From an average distance of 93 million miles (150 million kilometers), Earth is exactly one astronomical unit away from the Sun because one astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. This unit provides an easy way to quickly compare planets' distances from the Sun.

5. earthsky.org › astronomy-essentials › how-far-is-a-light-yearHow far is a light-year? Plus, distances in space - EarthSky

   earthsky.org › astronomy-essentials › how-far-is-a-light-year

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   27 kwi 2023 · So, a light-year is 5.88 trillion miles (9.46 trillion km). However, stars and nebulae – not to mention distant galaxies – are vastly farther than one light-year away. And, if we try to ...

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

   www.space.com › light-year

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   22 gru 2021 · A light-year is the distance a beam of light travels in a single Earth year, which equates to approximately 6 trillion miles (9.7 trillion kilometers). On the scale of the universe,...