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- Approximately 5.88 trillion miA 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 12 km), which is approximately 5.88 trillion mi.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 km) , which is approximately 5.88 trillion mi. As defined by the International Astronomical Union (IAU), a light … 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 … 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 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
1838Friedrich 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 See more
• 1 petametre (examples of distances on the order of one light-year)
• Einstein protocol
• Hubble length See more• The dictionary definition of light-year at Wiktionary See more
Wikipedia text under CC-BY-SA license WEBFor 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!
WEBSo, 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.
WEBThe result: One light-year equals 5,878,625,370,000 miles (9.5 trillion km). At first glance, this may seem like an extreme distance, but the enormous scale of the universe dwarfs this...
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 …
WEBA 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 astronomical distance.
What is a light year? Find out. | Sky Archive | EarthSky
WEBAstronomers 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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