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Light-year - Wikipedia
https://en.wikipedia.org/wiki/Light-year
WebA 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, which is approximately 5.88 trillion mi. 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 ...
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What Is a Light-Year? | NASA Space Place – NASA Science for …
https://spaceplace.nasa.gov/light-year/en/
Web3 days ago · 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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How Far is a Light Year? | The Fastest Thing in the Universe
https://astrobackyard.com/light-year/
WebA 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).
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How far is a light-year? Plus, distances in space - EarthSky
https://earthsky.org/astronomy-essentials/how-far-is-a-light-year/
WebApr 27, 2023 · It travels at 186,000 miles per second (300,000 km/sec). So, a light-year is 5.88 trillion miles (9.46 trillion km). However, stars and nebulae – not to mention distant galaxies – are vastly...
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How Far is a Light Year? - Universe Today
https://www.universetoday.com/45003/how-far-is-a-light-year/
WebNov 13, 2009 · A light year is 5,878,625,373,183.6 miles. And a light year is 63,241 astronomical units (1 astronomical unit, or AU is the average distance from the Earth to the Sun). But a light year isn’t the...
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What is a light-year? | Space
https://www.space.com/light-year.html
WebDec 22, 2021 · To find the distance of a light-year, you multiply this speed by the number of hours in a year (8,766). The result: One light-year equals 5,878,625,370,000 miles (9.5 trillion km). At...
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Light-year | Distance, Measurement, Time | Britannica
https://www.britannica.com/science/light-year
WebMar 6, 2024 · Light-year, in astronomy, the distance traveled by light moving in a vacuum in the course of one year, at its accepted velocity of 299,792,458 metres per second (186,282 miles per second). A light-year equals about 9.46073 × 1012 km (5.87863 × 1012 miles), or 63,241 astronomical units.
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What is a light-year? - Exoplanet Exploration
https://exoplanets.nasa.gov/faq/26/what-is-a-light-year/
WebLight-year is a celestial yardstick, the distance light travels in one year. Light travels at 186,000 miles (300,000 kilometers) per second, 5.88 trillion miles (9.46 trillion kilometers) per hour.
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What is a light-year? - NASA Science
https://science.nasa.gov/exoplanets/what-is-a-light-year
WebLight-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. It’s the distance that light travels in a specific period of time.
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What is a light year? Find out. | Sky Archive | EarthSky
https://earthsky.org/space/what-is-a-light-year/
WebFeb 20, 2013 · Christopher Crockett. February 20, 2013. A light-year is how astronomers measure distance in space. It’s defined by how far a beam of light travels in one year – a distance of six...
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