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- 6 trillion miles (9.7 trillion kilometers)A light-year is a measure of distance that represents how far light travels in one Earth year12. One light-year is equivalent to about 6 trillion miles (9.7 trillion kilometers)2. To visualize this distance, one can use a scale model where one inch represents the Earth-sun distance, which is about 93 million miles (150 million kilometers). On this scale, one light-year would be one mile (1.6 kilometers)3.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.In one Earth year of 364.25 days (8,766 hours), light travels a distance of 5,878,625,370,000 miles (9.5 trillion km). This distance is referred to as one light year.interestingengineering.com/science/lightyears-101-…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).www.space.com/light-year.htmlGenerally speaking, there are 63,000 astronomical units in one light-year, and 63,360 inches (160,000 cm) in one mile (1.6 km). This wonderful coincidence enables us to bring the light-year down to Earth. So, if we scale the astronomical unit – the Earth-sun distance – at one inch, then the light-year on this scale represents one mile (1.6 km).earthsky.org/astronomy-essentials/how-far-is-a-ligh…
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Light-year - Wikipedia
A light-year, alternatively spelled light year (ly or lyr ), 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 km), which is approximately 5.88 trillion mi. As defined by the International Astronomical Union … See more
As defined by the International Astronomical Union (IAU), the light-year is the product of the Julian year (365.25 days, as opposed to the 365.2425-day Gregorian year or the 365.24219-day Tropical year that both approximate) … See more
The light-year unit appeared a few years after the first successful measurement of the distance to a star other than the Sun, by Friedrich Bessel in 1838. The star was 61 Cygni, … See more
• 1 petametre (examples of distances on the order of one light-year)
• Einstein protocol
• Hubble length
• Orders of magnitude (length) See more1838Friedrich Bessel successfully measured the distance to a star other than the Sun, by using a 160-millimetre (6.2 in) heliometre designed by Joseph von Fraunhofer.1851The light-year unit appeared in a German popular astronomical article by Otto Ule.1984The International Astronomical Union (IAU) defined the light-year as the distance that light travels in a vacuum in one Julian year (365.25 days).Distances expressed in light-years include those between stars in the same general area, such as those belonging to the same spiral arm or globular cluster. Galaxies themselves span … See more
Distances between objects within a star system tend to be small fractions of a light-year, and are usually expressed in astronomical units. However, smaller units of length can … See more
• The dictionary definition of light-year at Wiktionary See more
Wikipedia text under CC-BY-SA license What Is a Light-Year? | NASA Space Place – NASA …
WEBSep 17, 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 …
How Far is a Light Year? | The Fastest Thing in the …
WEBLight 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 …
What is a light-year? - Science@NASA
What is a light-year? | Space
What Is a Light Year? Definition and Examples
WEBMay 28, 2020 · A light year (ly) is the distance light travels in one Earth year. It is 9.4607×10 15 meters or 5.8786×10 12 miles, about 63 astronomical units or about 0.3 parsecs. It is an intermediate unit of …
What is a light year? Find out. | Sky Archive - EarthSky
WEBFeb 20, 2013 · Astronomers measure the distance to the Andromeda galaxy using light-years. One light-year equals about 6 trillion miles. This galaxy is over 2 million light-years from Earth.
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How Far is a Light Year? - Universe Today
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...
Scientists Say: Light-year - Science News Explores
WEBMar 16, 2020 · One light-year is about 9.48 trillion kilometers (5.88 trillion miles). That’s a huge distance. In our solar system, Neptune is the farthest planet from the sun at about 4.5 billion kilometers (2.8 billion miles) from …
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