how far a light year
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- by John Carl Villanueva on September 10, 2009. 1 light year is the distance light can travel in vacuum in one year’s time. This distance is equivalent to roughly 9,461,000,000,000 km or 5,878,000,000,000 miles. This is such a large distance. For comparison, consider the circumference of the Earth when measured at the equator: 40,075 km. This visible-light image shows the galaxy dubbed UGC 3789, which is 160 million light-years from Earth.
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- It really is an incredibly long distance -- a lightyear is roughly 6 trillion miles or nearly 10 trillion kilometers. Here's how you calculate it. You start with the speed of light, which is about 186,000 miles per second. Then you multiply that by 3,600 seconds in an hour. Then you multiply that by 24 hours in a day. Then you multiply that by 365 days in a year.
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- 1 light-year = 63240 AU (astronomical units) Just for information, 1 light-year is equivalent to the distance travelled by light in 1 year moving in a vacuum. 1 light-year is about 9.4607 * 1015 metres. 1 astronomical unit (AU) is equivalent to the average radius of the Earth's orbit. 1 AU is about 1.4960 * 1011 metres. Simple arithmetic calculation yields the answer that 1 light-year = 63240 AU to a good approximation.
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How many miles are in a light year? There is an exact numerical answer to this question. By definition, 1 light year is exactly 9,460,730,472,580,800 meters. By definition, 1 mile is exactly 1,609.344 meters. So, 1 light year is exactly 5,878,625,373,183 and 849/1397 miles, by definition. Written May 20 • View Upvotes.
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1 light year is equal to how many years of the Earth? The light-year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word year, the term light-year is sometimes misinterpreted as a unit of time.
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What Is a Light-Year? How huge? Light moves at 186,282 miles per second, or 299,792.5 kilometers per second. That's 670.6 million miles an hour. The distance to the nearest star is 4.3 light-years, or 25.3 trillion miles (40.7 trillion km). The first mention of light-years dates back to 1838 and a German scientist named Friedrich Bessel.
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What Is a Light-Year? Very big. To quantify the vastness of the cosmos, astronomers often refer to things being a certain number of light-years away. What does that really mean? Though seemingly contrary to how it sounds, a light-year is a measure of distance, rather than time. A light-year is the distance light travels in a year. Specifically, the International Astronomical Union defines a light-year as the distance light travels in 365.25 days. In a similar vein, you could describe 60 miles as a car-hour (the distance a car travels in an hour on a highway).
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1 light year is equal to how many years of the Earth? The light-year is a unit of length used to express astronomical distances. It is about 9.5 quadrillion metres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days).
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How many Earth years are in a light year? A light year is a measurement of distance where as one Earth year is a measurement of time. 1 light year is the distance a photon of light travels in 1 Earth year which is about 9,460.5 billion km.
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What is a light year? ­So to measure really long distances, people use a unit called a light year. Light travels at 186,000 miles per second (300,000 kilometers per second). Therefore, a light second is 186,000 miles (300,000 kilometers).
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What is a light year? A light year is the distance that light can travel in a year, or: 186,000 miles/second * 60 seconds/minute * 60 minutes/hour * 24 hours/day * 365 days/year = 5,865,696,000,000 miles/year. A light year is 5,865,696,000,000 miles (9,460,800,000,000 kilometers). That's a long way! Using a light year as a distance measurement has another advantage -- it helps you determine age. Let's say that a star is 1 million light years away.
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light-year Definition of light–year. 1 : a unit of length in astronomy equal to the distance that light travels in one year in a vacuum or about 5.88 trillion miles (9.46 trillion kilometers)
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What is a light-year? So light from a star at one end of our galaxy takes 20 times longer than all of recorded history to get to the other end. 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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"""Geographic Features Nile River Sahara Desert"" Essays and Research Papers" Natural geographical features consist of landforms and ecosystems. For example, terrain types, bodies of water, and natural units (consisting of all plants, animals, and microorganisms in an area functioning together with all of the nonliving physical factors of the environment) are natural geographical features.or example, terrain types, bodies of water, and natural units (consisting of all plants, animals, and microorganisms in an area functioning together with all of the nonliving physical factors of the environment) are natural geographical features.
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According to astronomers what is a light year it is a math question? It is the distance that light can travel in one year. Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km.
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What is a light-year? The closest star to Earth, other than the sun, is Alpha Centauri at some 4.4 light-years away. Scaling the Earth-sun distance at one inch places this star at 4.4 miles (7 km) distant. The red star in the center of this picture is Proxima Centauri, our sun's nearest neighbor among the stars. A beam of light from this star takes about 4 years to travel to Earth.
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- Even further away is the famous “light year,” the distance light travels in one year. I’ll repeat that just in case you have to re-look at the last line. A light year is the distance light travels in one year. That distance is 5,900,000,000,000 miles.That’s right, five trillion, nine hundred billion miles that light travels in one year. It is often rounded up to 6 trillion miles in a year or that a light year equals a distance of 6 trillion miles.ven further away is the famous “light year,” the distance light travels in one year. I’ll repeat that just in case you have to re-look at the last line. A light year is the distance light travels in one year. That distance is 5,900,000,000,000 miles.
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- ­So to measure really long distances, people use a unit called a light year. Light travels at 186,000 miles per second (300,000 kilometers per second). Therefore, a light second is 186,000 miles (300,000 kilometers). A light year is the distance that light can travel in a year, or: 186,000 miles/second * 60 seconds/minute * 60 minutes/hour * 24 hours/day * 365 days/year = 5,865,696,000,000 miles/year. A light year is 5,865,696,000,000 miles (9,460,800,000,000 kilometers).
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How fast is a light year ? Theres Another Link Like Yours That Tells You The Same Thing... A light year is a measure of distance, not speed. The word 'year' seems strange, I know. In a vacuum, light travels about 186,000 miles in one second. The moon is roughly 240,000 miles away, for comparison. So in one second, light from earth would make it most of the way to the moon! Now let light travel for one full year, and you could figure out how far that is.
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1 light year is equal to how many years of the Earth? A light year is the distance light will travel in one year, a light minute is the distance light will travel in one minute. The speed of light is 299 792 458 metres per second …. In one minute light will travel 60 x 299 792 458 = 17 987 547 480 metres.
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- Actually I think the answer would be C. 8 earth years. The reason for this is because light years is literally the amount of time it takes for light to travel in a earth year. There is no mathematical expression needed for this, it says it in the problem. If it takes light to travel 8 years to a star its 8 earth years.
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Final AnswersÂ© 2000-2018 GÃ©rard P. Michon , Ph.D. Since a light year is a unit of distance, we isolate the equation for distance, so distance= speed times time. Since the speed of light is equal to 3x10^8 m/s, and there are 3.156x10^7 seconds in a year, multiplying these two numbers gets us 9.46x10^15 meters in a light year.
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1 light year is equal to how many years of the Earth? The light-year is a unit of length used to express astronomical distances. It is about 9.5 trillion kilometres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days).
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- The next brightest looking is about 910 light years away, but the next brightest looking is only about 220 light years away. There is about 5,869,713,600,000 miles in a light year or about 9,445,950,434,502 kilometres. 4 people found this useful.
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JUST THE FACTS Most objects in space are so far away, that using a relatively small unit of distance, such as an astronomical unit, is not practical. Instead, astronomers measure distances to objects which are outside our solar system in light-years. A light-year (ly) is the distance that light can travel in one year in a vacuum (empty space). The speed of light is about 186,000 miles or 300,000 kilometers per second.